The term refers to a brass-bronze alloy guard that has been hand-finished or chemically patinated to produce a warm, antique gold tone — distinct from polished brass or modern gold plating. The process typically involves controlled oxidation or heat treatment followed by hand-buffing, leaving high-relief areas brighter while recessed detail darkens. The result is a three-dimensional depth that reveals the underlying motif — dragon scales, lion mane texture, feather detail — far more effectively than a flat, uniform metallic coat. This patina is stable under normal display conditions and does not require special sealing.