After years of neglect, I decided to clean up my 24 in. 1973 vintage Schwinn Sports Tourer bicycle, purchased from Chucks Hardware in Pullman, WA for $202.00 in the fall of 1973, as those were the only 2 years that the orange colors were available. Frame was stripped and sanded and given a fresh coat of orange paint, close to it's original color. Interestingly, the frame has no serial number stamped on the head tube as it is supposed to. Likely this was due to it being replaced under Schwinn's lifetime warrantee a few years after I bought it, when one of the bottom bracket bearing cups just popped out of the frame, stripping off the internal threads. Schwinn shipped out a new frame to the hardware store and they reassembled the bike at no cost as I recall. So my guess is that Scwhinn had spare frames for this, but since they did not make it into finished bikes, they did not get stamped.   (1/11)