(Note: Measurements are outside max. dimensions unless stated otherwise).18th Century : Flat plate escutcheon with shallow crisp punched and engraved decoration.OUTSIDEHeight 50mm. (1 15/16")Width 40mm. (1 9/16")Thickness 2mm. (1/16")KEYHOLEHeight 17mm. (5/8")Diam. of hole 6mm. (1/4")Width at narrowest part of neck 4.5mm. (3/16")Width at base of taper 6.5mm. (1/4")Straight edges without chamfer.