How to age, and add a patina or rust to small metal items. Fill a plastic or glass container half full of vinegar, and sprinkle in approximately 1tsp salt. Drop in keys, clips, hinges, watch parts, locks... any metal you want to 'age'. Leave soaking overnight. Repeat the process if desired. Given enough time and exposure almost all metal will age beautifully.
Fradley antique sterling silver teaball with a hammered finish and three supporting legs, lid on small hinge, from 1866 or later. Early in the 19th C. tea infusers became popular and were made in many different styles. This plain solid example would have been ideal for travelling and bivouacs. Offered by Britannia Fine Antique Silver