Precious metals and their alloys and goods in precious metals or coated therewith, not included in other classes, namely, articles of jewelry, precious stones or semiprecious stones, pearls; boxes, cases, caskets, powder cases, buttons, cufflinks, tie pins, breast pins, belt buckles, stands and mountings for objects, candle holders, trays, serviette rings, trinkets, statuettes, photograph frames, and medals, all of the foregoing made of precious metals and their alloys or coated therewith; horological and other chronometric instruments, namely, watches and clocks