(Note: Measurements are outside max. dimensions unless stated otherwise).
18th Century : Flat plate escutcheon with chamfered edges.
OUTSIDE
Height 42mm. (1 5/8")
Width 63mm. (2 1/2")
Thickness (variable) 1mm. (1/16")
KEYHOLE
Height 18mm. (11/16")
Diam. of hole 7mm. (1/4")
Width at narrowest part of neck 5mm. (3/16")
Width at base of taper 7mm. (1/4")
Original would have had shallow chamfered edges. Castings may require sharpening up with a needle file.