Sekine Bicycle Database

In an effort to better decode the Sekine serial numbers, I set about collecting as many numbers as I could and organizing them into a database. Why do this? Because the more numbers collected, the more accurate the underlying pattern becomes. As part of the process, I track other things about the bicycles- like decaling and components- because these help inform the bigger picture. Eventually I hope to find out why a certain decal was used one year and not the next- likewise with lugs, paint, and even models.

For the database to be successful, I need a little bit of help from every Sekine owner. I don't post or share the numbers without permission, and the serial is something every owner should have written down anyway.

just barely legible

Start with the serial number. Sekine serial numbers are stamped underneath the bottom bracket, and will follow one of two codes: Code 1 is a letter/number followed by numbers, like Y6 22222, and Code 2 is numbers followed by a letter/number, like 22222 B6. Spaces count. Sometimes the numbers will be hard to read, with either the top or bottom edges cut off by a weak stamp; for example in a particular series the number 8 will look like an X.
Other frame details that are nice to know are if it came with a chrome-tipped fork, if the frame has chromed ends, if it has plain stamped drop outs, what colour it is, and if it has brazed or clamp-on cable guides. Some of the frames also have different lugs, depending on model and year.

Next important is frame marking. A few clear, well-lit photographs really help, but the following details are important:
- Headbadge: is it the CS Jewel, one of the Medialles, or the rarer Maple Leaf?
- Down Tube Decaling: Does it say "World Finest Bicycle Made by Sekine", or 'SEKINE' in art deco lettering, or the modern SEKINE font?
- Seat Tube Decaling: Does it have a made in Japan or Canada sticker, a cro-mo tubing sticker, and which of the seat tube 'crests' does it have?

Would the owner of this beautiful red mixte please contact me?
Finally we get to the components. Component dating can be useful, but is not definitive. Components can always be switched or upgraded, substituted, and the bike could even have been assembled with old parts. The most reliable part stamps seem to be the cranks and stem, but usually Shimano parts (after 1976) have date stamps as well.
- Cranks are easy- look on the back, near the spindle. SR brand cranks will have numbers in a small circle, like (9/6) or (77H). Often hard to read.
- SR stems have a similar date code stamped in a circle, below the 'minimum insertion' line.
- Shimano parts have two letter codes stamped onto the backs, like EJ or FC.
See this website for more information on dating components: Vintage Component Dating

To share your serial number, a photo, a story, or as many other details as you know, please leave a comment, or email me: rod of the flies (AT) yahoo (DOT) ca (no spaces, no spam).

I'd like to add a quick thank-you to a guy who posts online with the user name T-Mar, who inspired this effort. If you're out there, please contact me.

67 comments:

  1. I am wondering if I have a Sekine. serial number N285347

    thanks. ReBecca

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    1. ReBecca, This maybe a Miyata/Univega serial number from 1985.

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  2. The Sekines imported to and made in Canada during the early 1970s to 1981 have serial number with the letters W to Z, then starting again from A to F.

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    1. Mine has a W and was defiantely made in japan

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  3. I have a Sekine 10 Speed bike that I purchased in the 70s and it is 100% original including tires It is in pretty good shape Since I am 73 I will not be riding it and would like to donate it to a good home where it would be appreciated I live in the Hamilton area Email me at flyc170@cogeco.ca if interested I can send you pictures

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  4. I am not sure how to contact who ever is interested in the red Sekine Mixte pictured above, but I have a bike that is identical to the one pictured, right down to the original issue alloy fender set. You can reach me through my MY "TEN SPEEDS" website, if you wish.

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  5. I still have the Sekine 'Blacky' that I Purchsed on My 24, 1972. In Great shape. I have had a few parts Re-Chromes for appearance but can't go anywhere without being stopped and asked where I got it. No one believes it is 4o years old.

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    Replies
    1. The Sekine Blacky is a bit of a rare bike, and quite the oddity. I've seen a couple of them come up for sale- only bike I've ever seen with 4 speeds.

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  6. I have a Sekine Medialle s/n Z11738. Green, chrome front forks, Shimano Suntour VGT, SR crank, SR Champion handlebar. Purchased early seventies. Stored for approx. 35 years.
    Won't ever be riding it but if cleaned up (needs tires and pads for sure) - what is its sales value?

    Thanks for any advice.

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    Replies
    1. is this still for sale? let me know - I will sendyo a box for shipping!

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  7. Here are the serial numbers and my best guess as model on Sekine bikes & frames in my possession:
    SIU 272 - 1157 BX You can see it on my wordpress blog: http://lomaparkpeter.wordpress.com/
    Best guess SHT, #Y1139192, frame and forks only, stripped down by a someone who claimed the fork was bent, and he calls himself a bicycle recycler.
    Last item, Verona with two rows of letters/numbers stamped on the down tube. Hard to read the first row due to curvature of tube and heavy layering of paint but my guess is DS80 and the second row of numbers is 604462.

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    1. sekinepete,

      the DS80 serial number: the frame is made by Dodsun Bicycle and Machinery Manufacturing of Taiwan.

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  8. I was the original employe of Sekine Canada and became plant manager.I was there till it closed.

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    Replies
    1. Hey Wayne,
      If you've got any stories or information about Sekine to share, I'd love to hear from you.

      Delete
  9. I have a 1978 (I guess) Sekine 1 speed.... hard to call it a mountain bike, but that's what it is. Can't find a serial number.

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  10. Just bought a Sekine at a neighbor's yard sale. He said somebody gave it to him. Has "Made in Japan" on seat tube, "World Finest Bicycle Made by Sekine" on down tube. SunTour derailleurs - Spirt front, Vista (?) rear, barcon shifters. Maxy cranks. Sunshine hubs. Dia Compe brakes/levers, stem has nothing visible but "Compe" and "Forged" on top of clamp. Nothing visible on bar. Brooks saddle. Decent shape, but needs to be gone through when I get time. Guy was going to give it to me, but I made him take $20. Doesn't match anything I've been able to find online. -Dan

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    1. that is not original but nice upgrades, the barcons and the brooks saddle...Nor is diacomp and Maxy cranks original but still nice. Pre 1973 bike.

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  11. Followup to previous, cranks have "47-4" on the back. April 1972? Serial on BB is W 66427. Oh, and the saddle is English, but not Brooks, not that it matters. So worn out it's hard to see.

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  12. Hey, I found a Sekine in the Toronto Area. The ad says pre 1973 and therefore made in Japan.

    http://hamilton.en.craigslist.ca/bik/3799181042.html

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  13. Hi Rod
    I bought my bike new in 1978. It had been sitting in a store in Flin Flon. Y6 3357 What does the serial number tell me?
    It is green, Cr-Mo butted tube frame, Medialles headbadge.
    Rob in Pinawa, MB

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  14. Have Medialle Cream 10 Speed Serial 2811 F6

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  15. Hey just bought a Sekine frame for a little pet project, I have a lot of work to do from. Serial number 0430 D5 is there anything you can tell me about the bike? Preferably the exact model. Thanks
    Alex in Vancouver, BC.

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  16. My brother-in-law just gave me a gold / made in Japan / single rhinestone in the GS ornament / chrome tip and chrome half forks / world finest decal. The serial # on it is W 86958.

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    Replies
    1. By the way, Do you know what model this is? Thanks!

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  17. Hi. I just purchased an old Sekine with serial # W 107191. I think it may be an SHT??? I have it on craigslist at http://albany.craigslist.org/bik/4127517379.html
    if you want to see it. Any information would be great. Thanks. Nick

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  18. I just picked up a sekine frame and fork and I could use a little help determining the right bottom bracket size. It has a 70mm wide bottom bracket frame, but I'm not sure if I should be getting English or Italian threaded cups. Does anyone know if this has English or Italian threads?

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  19. Hello Rob,

    I pulled a Sekine out of the trash before it snowed.SHS 271? Sekine Canada/Japan Medallion headbage, titlest mechs, tourney center pull brakes, 27" wheels, clamp on cable guides, forged drop outs, Shimano dual pull levers (very nice for dp) chromed fork blades, original colour green. Now covered in blue white and green spray paint. Needs a full strip and repaint. Project bike. Serial number on BB Y2 0634.

    Please help me ID.

    :D

    Tom the tank
    Montreal


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    1. Greetings,

      I have this all chrome Sekine bike and I was wondering if someone here could tell me a little more about the history/story behind it. I've heard things like there was only 2 sold per province in Canada. Thanks for any assistance.

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  20. Greetings,

    I have this all chrome Sekine bike and I was wondering if someone here could tell me a little more about the history/story behind it. I've heard things like there was only 2 sold per province in Canada. Thanks for any assistance.

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  21. I have A dark green sekine which is completely original number on bottom of frame is 1977 D3, what model would this be?

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  22. I have found a Sekine mountain bike. Does anyone have any info on the mountain bikes?

    Thanks

    Mike

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  23. Ser # FU02997 - Black (RM-20 I think) all original components. Cables, brake pads, tape etc replaced. Any insight/confirmation?

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    Replies
    1. i just bought one with FU 02990! originaly sold at caps in bc

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  24. I have a red sekine, I believe the serial number is Zb4019, does that seem right?

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  25. I have a Green Sekine, that was my birthday present turning 19, well I'm now 53 and it's still flying! I will get you some pictures, interested in which model it would be, serial number is 1611 C2. bought in Penetanguishene, On.

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  26. I have a light blue Sekine Medaille, Made in Canada. Serial Number is 1324 CI. What can you tell me about my bike in terms of the year, model, and quality?

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  27. OK I have a peach or orange sekine it says gs and sun tour all over the series number is w 66498

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  28. I just found this site and will post more later.
    I worked in a bike shop during the summers of 77-79. I know lots about these bikes, and in particular, the ones made in Canada. These were the best-built bikes we received in the box, bar none.
    I have a model SHS271 in 25" frame. I've changed most of the components and ridden it perhaps 100K km. We're very close.
    GregC

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  29. I bought a Sekine ladies bike for $95, the front Araya 26x1-3/8" rim and tire are destroyed but the rest of it is near-mint. Made in Canada seat-tube sticker, pearl white paint, cruiser bars, 5-speed. The serial number is 0373 D6. The Shimano part date codes tell me 1980 from the deraileur (EI), and 1977 from the brake levers (BJ). It has no model name anywhere on it. It has white plastic hand grips with little red "dot" reflectors that look like they could be original.

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  30. I have two 10 speed Sekine bikes:
    One I bought in 73, blue with chrome forks, serial 65491, rear brake cable on right, no "sekine" on rear wheel guard, Sun Tour gear set, handlebar shifters (option I requested at purchase). I believe it was a GS.
    Second is all pearl white - no chrome, serial B1 3054, rear brake cable on left, "sekine" on rear chain guard, Shimano gear set.
    Both: head badge CS jewel, "World Finest Bike Made By Sekine", and any parts that have anything state "made in Japan" including both sets of derailleurs, 27x1-1/4 and 22" frame.

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    Replies
    1. Just got a Sekine of seemingly very similar vintage to yours, says 'World Finest Bicycle'. The name Sekine is cutout in the metal of the rear chain guard. Is this like your rear chain guard? Mine is green with the half chrome forks, and definitley made in Japan. Let me know, if you don't mind. thanks, Richard

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  31. I just bought a dandy "new pepsi" blue sekine at a yard sale (in its home province of manitoba) for 20$. It has the ultra fantastic rhinestone on front and the "world finest". It's a little rusty, but a beauty to me. I'm certainly curious to know more about it :) The seller even gave me a basket for it, not sure if it's original but it's also a little worn.

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    Replies
    1. Oh, and it's a ladies bike. The cute old style (not the racing style) with stainless fenders. The tires (probably the original white walls) are shot, the brake squeaks, but otherwise is going well. I bought it to be my grocery runner. Thought I'd look stylish while I shopped.

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  32. I have a green Sekine Serial # Z92888 I received new in the late 70's from Tuxedo Cycle and Sports in Calgary. It has the following components:

    Shimano Tourney center pull quick release brakes
    Alloy levers with what we called coaster brakes
    Shimano Thunder Bird derailer
    Shimano Lark rear derailer
    Quick release wheels
    Chrome tip forks
    SR crank arms and handlebar

    Unfortunately the rear wheel and cassette are no longer with the bike. The rim was damaged and I replaced the whole assembly back in the 80's. I put a lot of hard miles on this bike. I rebuilt it a few years ago and it is quite functional.

    I would be interested in purchasing the correct parts if anyone has them. I am actively riding again as a commuter.

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  33. Please help me to recognize the bike. It is Sekine with the SN Z40h. How do I know what is the model name? I found some stuff on internet saying it is 1973-74, but not mor then that.

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  34. Sorry, missed a couple of details: headbadge - CS Medialle, Canada. The fork tips are chromed.

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  35. Found an older Sekine that I am building up as a college bike for my son:

    Gold frame in 25"size with chromed fork and frame ends. Jewel headbadge, "World Finest Bicycle Made By Sekine" on downtube and "Chrome Molybdenum Tubing and Distributed by Beacon Bicycle" and small "Made in Japan"decal on seattube. BB Serial No. is W 77747. Seat lug has "6099" stamped on it, perhaps "6049".

    SR alloy stem, Sakae Custom Road Champion alloy bars, DiaCompe brake levers with extension levers, cantilever brakes with "Cherry" on bolts, funky Suntour stem quick release.

    Suntour downtube shifters with white plastic covers, Suntour "Spirt" front der (marked Maeda Industries, Ltd. Japan OE 4532"), Suntour V rear der, Sugino Maxy suaged cranks (marked "Forged 165 47-4").

    Rims are steel and marked "27x1 1/4 (H.P.), Made in France, Rigida Chromag SuperChromix", Normandy hubs, QR skewers marked "MM Atom", Sekine pie plate.

    Unmarked steel seatpost, "Ariake, Made in Japan" vinyl saddle.

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  36. got 2 deep red sekines from a garage sale. 1 male frame with CS Medialle sticker by the seat tube, maple leaf canada logo on the front tube. shimano brakes and calipers. 5 speed. shimano shifters, takag, serial stamped is FV10772. 1 female with CS Medialle sticker by the seat tube, Medialle crest/logo on the front tube, non shimano brakes, shimano shifters i think about same serial.

    can someone tell me what i have?

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  37. Thanks for the post. i am very impressed with your lovely post.I also want to share bicycle manufacturer too.

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  38. Hi,
    I recently bought a vintage bike, made of Tange steel. It's lugged and a 12 speed (2x6).
    It's been spray painted white, and I've been trying to determine what make and model it is.
    It looks like a Sekine (it's got shimano gear and guidons phillipe dropbars).
    I've found a serial number at the bb which reads CB96.
    It would be great if you could help me find out what it is!

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  39. I am helping a buddy clear out some "junk" from his property as the code enforcer has asked him to do this. I grabbed this assumed Sekine bike because it was light and figured at the least I can make a nice road bike out of it. The Serial Number is Z36599. I will send pictures to your e-mail. It is basically trash in my opinion but I thought I could use the frame, a few good parts, and piece together something from the old days that hurts my butt to ride. Heh, heh.

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  40. Hi there: I am the original owner of a Sekine Medialle serial number F101128. made by Sekine Canada Limited. Handlebars are Sakae Custom, Japan SR Road Champion. Shimano Tourney brakes and gears. Tires are 27x1 1/4. I am looking for more information as I am considering selling the bike. Thank you

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  41. I still have my Sekini 10 Speed my parents purchased for me when I was 19-10 years old in 1971 I think.
    The Serial # on the bottom is W65897 and is Olive Green. Replaced the back tire (rubber) last year from the original tire/tube and now a couple of spokes have snapped from rusting/corroding away.

    I still ride this weekly and proud of it. Close to 46 years of age. I love things that last this long, although my kids think I'm nuts.

    Paul
    (Paul_yardy@Hotmail.com)

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  42. I purchased my Sekine in the 70s. Now I am trying to identify the exact model and year after all this time.

    I believe it to be from 1973 or earlier as it has the Made in Japan and Worlds Finest Bicycle logos on the seat tube. The downtube has SEKINE in plain font. The crank set says 6 over 3 which seems to fit, and the general date fits with when I should have bought it.

    My problem is the model. The head badge is missing (why I don't know)so I am trying to determine whether it is an SHB/C or an SHT.

    It has double butted chrome moly tubing frame with chromed fork ends and chain stays, SR headset and Road Champion bars, SR cotterless crankset, Shimano Titlist front and rear derailleurs w Shimano Finger Tip down tube friction shifters and Shimano Tourney centre pull brakes. Serial is X4 09289.

    Any help in positively identifying the model and year would be much appreciated.

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    Replies
    1. X = 1973 4 = APRIL Yours was made in Japan. Those stopped been assembled in japan mid 1973 year as canadian production began in august/september (x8/x9) Mine is X10 ;-)

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  43. Have a sekine cs original serial number 2536 by what model is this and what year?

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  44. Serial number 2536 BY what year and model?

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  45. just bought from auction a red men's sekine medialle #1617C5 .. appears all original even has the carrier on the back fender.. ball-park of value ?

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  46. Have a Sekine GS W 9693. How much worth in great condition. All origional except tires and tubes and maybe seat and have a plastic seat that came with it.

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  47. I have a Sikine Medialle SR Five Speed Ladies Bike s/n 78U540 has the Head Badge and Badge below the seat on the upright frame it has Shimano Lark rear shifter and Sakae Chain wheel.....the serial number is certainly not as your description...

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  48. Have a Sekine, "CS" headbadge, chrome moly downtube decal,Maxi cranks,Suntour derailler, "World's Finest Bicycle Made By Sekine Cycle",royal blue paint, Sakae Custom handlebars. I believe I purchased it in 1972 or 1973. Serial number is Z13372.

    Is it Japanese or Canadian? Rare?

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  49. Purchased a green Sekine - Japanese built with rhinestone headbadge. "TNG" Co-Mo double butted tubing. No. 2010. Serial Number: W 95695

    Sugino Cranks, Shimano derailleurs, & SR Stem/Handlebars. Really cool old Sunshine hubs..

    Any more info would be helpful!


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  50. i have a sekine 10 speed SN FV 26878 Medialles on the front and SEKINE down the frame.

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  51. Hello, Mine is a mystery bike as it does not match a single photograph I have found on the web. Serial is F002497. Cream with Medialle badge, made in Canada sticker, High end shimano components like the SHT I think it is? chrome front forks but not chrome anywhere else. Of interest is that the brake cable running along the top tube has braze on's instead of bands. Owner who gave it to me says he bought it out of the office/showroom at the factory back in the day and I have heard a fella on a forum who claims to have worked there indicate that they did mix and match for the showroom sales which might explain my mutt. What do you think?

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  52. I have the identical bike as Scott E,including the brazen on bands. S/N. FT00853, bought new in the summer of 82. Believe this is a RM20

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  53. OK here is a wierd one. I have a Sekine yellow and red 12 speed road bike with shimano and dura ace components. The bike frame has MacNeil decals all over it. MacNeil is a producer of BMX bikes so there may have been a branding partnership at one time. Not heard of any others.

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  54. I have a 1973 green with front and rear chrome forks, W 63520, made in Japan,worlds finest made by sekine, GS with jewel, sun tour components, changed out sewups for clenchers, quick levers for handlebars and levers, chrome molybde... Tubing,sekine crest with with diagnal silver center with blue outside bars on white,white circle above, blue parrot looking bird, and strange white wing type shapes coming from bottom sides of crest , brake cable clamped on along top, my sister had the same bike in a dark purple blue

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