I'd say 80% loose Rabbit Skin glued veneers. I'll get this flatten out add a couple missing pieces and French polish with a good wax finish. Barn find, Same Barn
I've got some 8"x8"x2" thick blocks of aluminum that I got from my FIL shop after he died. They come in handy quite often for weighing down things.
I can imagine they would heat up pretty well in a toaster oven and hold the heat for a while. Not sure where you would find things like this, lol, so probably not much help.