We have mostly Schwinns, but my wife picked a near perfect Columbia Tourist. Serial number by back hub is: P409083. The only serial number dating site I can find is via Sellwood Cycle's link. There, I see a great run down on s/n's, but NO, "P," serial numbers at all. I even went out again and double checked my eyesight on the number. Plain as day, it's a P.

Any tips here? We'd sure like to know when it was built.

Thanks,
Dennis