I've got an El Degas SG copy. It's got a bolt-on neck and a "post-lawsuit"
headstock (i.e., not "open book"), but otherwise it's a straight copy, visually & functionally. Basic TOM/stoptail bridge setup, of just-adequate quality (plastic saddles
). Grover tuners are obvious replacements--originals long gone. "Proper" pickguard shape. Cheapo "top hat" knobs, but the 3-way seems pretty sturdy (better than moder Epi's). I haven't opened it up to see if there are any markings on the pups, but they're chrome-covered humbuckers with a lower perceived output than the ones in my CS-350.
The demi-semi-transparent finish shows that the body is actually a five-layer laminate, with thin layers of mystery wood (might even be mahogany), on the top, back and in the middle, and thicker layers of (different?) mystery wood between.
The neck is a wide/thin C, very similar in feel to the aformentioned Cardinal but a little thinner, and a little flatter on the back. I believe it's one piece, and probably mahogany. The bound (cheap rosewood??) fretboard is flat, which is rather interesting with the not-quite-flat bridge radius
. Nice fretwork, though.
If I remember correctly (it's not in front of me now), the neck plate just says "Made in Japan".
All in all, I would guess that this model, at least, is not from Uncle Matt's hands.
(BTW--I know this isn't the For Sale forum, but I'd entertain reasonable offers...).