Hi, have you looked a the (ipdb) "internet pinball data base" there only showing one w/pictures. All the inside is the same as yours. But the cabinet is a brown color. From what I've found in buying and restoring a few myself is most from the 30s of this mechanical style only. No battery. Was mostly just all stained Oak,Walnut,Cedar etc....not saying all was stained, but mayoralty of the ones I have came by have been. Also the stand that yours is on. I would bet is original because a lot of the machines was offered table top & metal folding stand. Only a few I've seen had wooden ones. They started mounting the legs on the side corners when they slaked off on the metal stands. Stand was an option at a higher cost. Check this link out & for future reference they have, I think over 6000 pinball machines in the data base. If I can help any further just PM me.
http://www.ipdb.org/showpic.pl?id=630&picno=14278Frank