(Note: Measurements are outside max. dimensions unless stated otherwise).18th Century : Flat plate escutcheon with chamfered edges.OUTSIDEHeight 50mm. (1 15/16")Width 49mm. (1 15/16")Thickness (variable) 1mm. (1/16")KEYHOLEHeight 17.5mm. (11/16")Diam. of hole 7mm. (1/4")Width at narrowest part of neck 5mm. (3/16")Width at base of taper 6mm. (1/4")Original would have had steep chamfered edges. Castings may require sharpening up with a needle file.