Here’s one of a few Yale combo locks I have which all came off Ratner single skin safes. I used to see a few of these every now and then and, going from memory, nearly always the same type of safe. Combination lock mounted above the key lock, with the bolt of the combo lock also operating a simple sliding brass strip which acted as a blocker over the keyhole. Unusually the key locks were never the big block pattern powder proof locks, they were always inferior, smaller brass cased 6 or 7 levers.

The safes were always beautifully furnished with velvet lined hardwood compartments and slim sliding drawers for stock, they were also pretty big at around 5 foot high.
yesterday I dug out an original instructions leaflet and was wondering which model this one is. Always had a soft spot for these chunky old Yales, but never used to see any nice polished brass ones, they were always like this.