Hello! First post here. We have a vintage DaHon folding bike that is in immaculate condition. It's been stored for a very long time. We decided to take out of storage and clean the dust off of it. I'd like to know the age but I haven't had any luck in finding the serial number, so I thought I'd ask for help or suggestions. Could be that I'm just overlooking it. It has the patriotic DaHon California logo and I read that was the 1986 logo. Was that logo only 1986?