WOW!!!

...this one is fantastic; most interesting features!
Like it was suggested before, Semie made many one-off's and custom builds, so surprises will keep on popping up from time to time with Mosrites...and now this one.
The body shape probably could date it to the mid to late sixties (?)
Great pictures btw, it looks like Semie dug deep into his bottom drawer for parts that he had to use for this one...

...and I'm sure that I've seen that headstock shape before on the Forum somewhere. Start digging everyone...
TR, ...probably like yourself, I too can't wait to hear opinions, thoughts and insights from our true knowledgeable members here when they start chiming in. You seem to have something very special in your possession and the way you became to be the new owner is special too

Congratulations, hope you get it fully restored and working again.
Paul