Precious metals and their alloys; works of art of precious metal; jewelry of precious metals and alloys thereof and jewelry plated with precious metals, namely, rings, earrings, cuff links, bracelets, brooches, pendants, charms, chains and watch chains, necklaces, medals, medallions; precious stones and semi-precious stones; horological and chronometric instruments, namely, watches, watch bands and watch cases; key rings of precious metals and alloys thereof; key rings plated with precious metals; cases for watches and clocks in the nature of watches; jewelry cases