Old 02-26-20, 11:02 PM
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bikemig 
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The serial number will tell the tale. The vintage Trek site will tell you how to figure which model this is based on the serial number.

This is not a 720 as that is a touring bike with cantilevers other than in 1982 when it came with caliper brakes.

Given the parts group and color, I'd guess an '83 620.

Last edited by bikemig; 02-26-20 at 11:11 PM.
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