And on the inside of the case back, it says: PDB, Philadelphia Watch Case Co., Silverode, 6o4273. And scratched there by hand (hard to read, but I think it says) 24721, +1241, +124x, and 4968. You can barely see this in my pictures on your left hand side. According to PocketWatchDatabase.com it is a 7 jewel watch. The hands move easily with the use of the stem, but it will not turn so as to wind it up.

Its diameter is just short of two inches.