(Note: Measurements are outside max. dimensions unless stated otherwise).
18th Century : Flat plate escutcheon with chamfered edges.
OUTSIDE
Height 63mm. (2 1/2")
Width 86mm. (3 3/8")
Thickness (variable) 2mm. (1/16")
KEYHOLE
Height 18mm. (11/16")
Diam of hole 6.5mm. (1/4")
Width 5.5mm. (3/16")
Original would have had steep chamfered edges. Castings may require sharpening up with a needle file.