Le Tours were built in Chicago in 1979 and '80 only, if your bike is an '82 it was built in Japan. You can find the serial number on the underside of the bottom bracket housing. The serial number will tell you the month and year the frame was built, but a much more telling number is the tiny 4-digit number stamped into the headbadge, which will indicate the day and year the bike was built (dddY).