I'll ask around about the historic vehicle plates. It may mean no mods can be made...has to be stock, original (restored) condition. I'll ask my vintage car friends.
Last registered in 68? Wow. Well, you know the plate has not been issued to anyone else. I registered my Aristocrat which the previous owners had let lapse for 7 or 8 years, and was able to bring the plate current. It was the original blue and gold CA plate. But it was a 72 (first year for that color plate), and so was the plate, and I couldn't/didn't have to apply for a YOM plate (since it was the same plate from the beginning, and YOM starts at 68 or 69 now)..
I'm thinking you are safe with keeping the 60's plate if you pay a bit to the state to bring it current. That is awesome enough. The next thing I would do is try to find a YOM plate (39) and I don't know if there was a special sequence of numbers/letters at that time for trailers. On your current one it should have 2 letters followed by 4 numbers.
I would post this in the General Discussion so folks like Gage see it too. He's a car guy. In CA. I think you are best off registering it the way it is, with the 60's plate, and then looking into a YOM plate. Those suckers are expensive, but sometimes you find them for $10 in antique stores...some lady found them and thought they'd make cool decorations, or make them into purses, never did and just wants them gone.
Look online for 39 trailer plates. See what the letter/number sequence is. Then let me know..or tell us all...and I'll keep a lookout. I found a 70 trailer plate for my Grasshopper...and I'm hanging onto it until the YOM years change. Of course I may be too old to drive by then, but at least I've got the right plate!! Until then she's got a CA PTI plate. You have a cool plate worth hanging onto..mine had a NV plate and an expired CA PTI plate that they wouldn't reinstate.
Good luck and keep us posted. I love this stuff. As you can tell!!
