Dating Mirrors involves examining the frame, mirror plate, construction methods, materials and decorative style to establish an approximate period of manufacture. Features such as mercury glass, hand-carved frames, original backboards, foxing and traditional joinery can provide valuable evidence of age. Understanding these characteristics helps distinguish genuine antique mirrors from later reproductions and sympathetic restorations. *Related Terms*\ Foxing, Giltwood Mirror, Mercury Glass, Mirror Plate, Provenance, Restoration.