Walk clock with 8.5” face (Burnhamthorpe and Tomken)

Looking for a wall clock with the same size face and a removable back. I’m trying to fix this clock but it is sure to break when I try to separate the face from the back since the two pieces are old plastic with a pressure fit. Some clocks would be screwed together and that’s what I’m looking for. Just trying to fix a clock for a friend. Keeps time but doesn’t chime.