I picked this up at an antique store today. It has a definite glass dot at the top of the pinhole but is otherwise unmarked. Also has a large circular impression that I think is often seen on Beaver Falls products on the top of the dome. I really have no idea what it is. I can't find anything like it in the price guide. About 3.25 wide x 3.75 tall with an inner skirt. Any ideas?