Dating Brass involves assessing the age of brass objects by examining casting techniques, manufacturing methods, surface patina, construction and decorative detail. Hand-finished castings, traditional screw threads, natural oxidation and evidence of hand tooling can help distinguish antique brass from modern reproductions. The style of an object, together with its materials and craftsmanship, often provides important clues to its period of manufacture. *Related Terms*\ Brass, Brassware, Casting, Metalwork, Patina, Restoration.