Hansen Logos on the Bottom

A few years back I sold a Hansen Mike Doyle Model that had no logo on the deck but the hansen logo and the mike doyle gold star on the bottom. I was told at the time that in the 60s, shapers didn't put logo on the bottom and it might be fake. Can anyone shed light on this? I believe the guy I sold it to is trying to sell it on craigslist and I want to get in his face about it and maybe get my board back.

Thanks