This key hole cover is for a door. It is cast brass and larger than most key hole escutcheons. It was probably placed under a brass door knob and rosette back plate. The heavy brass piece has a fancy Victorian design.
We believe this is probably a reproduction, as it has “DESIGN PAT. JAN 8, ’84” stamped on the back
It also has a part number: 2922
The escutcheon measures 2 3/4 inches vertically and 1 1/4 inches at its widest point.
We will provide two brass screws.