(Note: Measurements are outside max. dimensions unless stated otherwise).18th Century : Flat plate escutcheon with chamfered edges.OUTSIDEHeight 42mm. (1 5/8")Width 63mm. (2 1/2")Thickness (variable) 1mm. (1/16")KEYHOLEHeight 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.