![]() ![]() This oddity verifies that the serial numbers were stamped on the components prior to any frame building. If that is true, there were 15983 serial numbers stamped on a headtube component before this bikes stamping. I would assume the 0 indicates that the previous dropout numbers were reused but have the additional 0 preceding the numbers. Looks like Schwinn stamped serial numbers on at least 32700 dropout components before they started stamping the numbers on the headtubes. What's funny is the dropout number is a larger number but it doesn't have the 0 preceeding the numbers. I relocated this eBay listing with a 1970 Tandem that is wearing two serial numbers, one on the left rear dropout and the other in the new location on the headtube. ![]() Schwinn made another serial number location change in 1970 but it was not at the beginning of the model year. Hopefully all that lost information can be reposted in this thread. I personally believe that sometime in the 50’s or possibly earlier, Schwinn actually stamped the serial number on the bikes component prior to the frame build and there is evidence that backs this up. During the early years a serial number was hand stamped possibly right after a frame was built but in the later years the thousands of SN’s stamped in one day was done by a benched mounted automatic stamping machine. Over the years Schwinn’s production practices and methods changed when their volume increased and when new tools were introduced. Although when using the date code associated to the serial number along with any date coded parts a bike may have, it will give you a rough idea of when the bike was actually built. The serial number was stamped on a frame for specific purpose, and it was not intended nor does it tell you the day, month and in some cases the year a particular bike was built. I am really proud of what I am doing at schwinncruisers.Since there are many misconceptions about the Schwinn serial numbers I want to devote this thread to clearing up all the mysteries, myths, rumors and falsehoods that lead one into believing that a date coded Schwinn serial number is the build date of a bike. In any case thanks for noting the tricky serial numbers. I am currently figuring out how to make a date / year tool for those four number serial numbers, and will be asking the community about special cases soon as well, like stings from taiwan, or paramounts, etc. Something else worth noting, there were also many obvious errors in the main lists, which can only be seen if you are really working with those numbers. ![]() there are so many overlapping serial numbers, and i have seen so many people go through lists of serial number and they think they found the right year, but they dont know that Schwinn used the same serial number two or three times.īy showing those pictures and choosing the location of the serial number t can sometimes be narrowed down. Remember, there is no such thing as complete records for Schwinn serial numbers, so not everyone's is going to work, but for a few million bikes, it will.Ĭman - thanks for appreciating that. If you try it and it doesn't work for your serial number, please let me know the serial number and I will check it out. If you do try it and it works for your serial number, great! The tool is on the homepage, top right hand side. I am wondering if some of you will try it out and let me know how it works for you so I can fix bugs in the code. I entered literally thousands of entries into it to accomplish this and it has been weeks since I started. It was a big job, and I am not through yet, but it currently works for most serial numbers that are 6 or 7 characters long. This means you can enter a vintage (1948-1982) schwinn serial number and get info about when it was manufactured. I have taken all the schwinn serial numbers from several databases and made a tool that automatically searches for it. Hello, my name is Patrick Sexton and I am the creator of and I have exciting news. ![]()
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