I doubt its a Trek. I think Trek started in '76 and Im guessing the '74 stuff is original (but could be old stock...). Also the serial number doesn't look anything like Trek's. The kid I got it from swore his dad bought it new in the "80's" and it was a Trek, but I think he was bogus.

By the way, is there any significance to the Campagnolo sticker or was it just another flashy selling point?
Thanks,
WjV