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). See this website for more information on dating components: Vintage Component Dating Shimano parts have two letter codes stamped onto the backs, like EJ or FC. SR stems have a similar date code stamped in a circle, below the 'minimum insertion' line. SR brand cranks will have numbers in a small circle, like (9/6) or (77H).
Cranks are easy- look on the back, near the spindle. The most reliable part stamps seem to be the cranks and stem, but usually Shimano parts (after 1976) have date stamps as well. Components can always be switched or upgraded, substituted, and the bike could even have been assembled with old parts. Component dating can be useful, but is not definitive. Would the owner of this beautiful red mixte please contact me?įinally we get to the components.
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? Down Tube Decaling: Does it say "World Finest Bicycle Made by Sekine", or ' SEKINE' in art deco lettering, or the modern SEKINE font? Headbadge: is it the CS Jewel, one of the Medialles, or the rarer Maple Leaf? A few clear, well-lit photographs really help, but the following details are important: Some of the frames also have different lugs, depending on model and year. 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. 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. 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. I don't post or share the numbers without permission, and the serial is something every owner should have written down anyway. 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.įor the database to be successful, I need a little bit of help from every Sekine owner.
As part of the process, I track other things about the bicycles- like decaling and components- because these help inform the bigger picture. Why do this? Because the more numbers collected, the more accurate the underlying pattern becomes. 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.
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