Most visitors online was 1990 , on 7 Feb 2022
none of the above. My guess is it may have been held in by a movement, but its heavy and solid brass.Could have had a clock in it. Does it stand up freely or does it have a hook on the back for wall hanging?
odds are something like that would be plated, not solid brass. Im thinking a clock face and movement, and it came with clock stuff.Might be a frame for a door entry lock if the opening is about an inch and a half in diameter. Ah, never mind, I see now it is too big.-Cort