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502 49470 000 163 22 M O S U This is stamp on the bottom of the crank on the frame. Can anybody decipher this model and year.

Jayson Meyers
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    Some important reading https://bicycles.stackexchange.com/questions/32872/what-is-the-purpose-of-a-serial-number?r=SearchResults&s=1%7C96.1166 – Weiwen Ng Aug 06 '22 at 00:32

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This is my bike frame. It's either 53 color flow Or 55 promotional Thunderbird.. Either the S is 1953 Or the U is 1955 Not Sure

Steven Mitchell
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  • Welcome to the site - are you answering OP's question or asking your own question? Are you claiming to be the OP ? – Criggie Jan 17 '23 at 08:25