TIFFANY, PLATINUM AND DIAMOND DINNER JACKET WATCH, SWISS CIRCA 1910 platinum case, diameter 43 mm, hallmark in case back, platinum dial with applied Arabic numerals adorned with small diamonds, small seconds at six o'clock, Dauphine hands; satin-finished case back with small shield at 11 o'clock with SIL monogram; movement with separate extra-flat bridges, signed Touchon & Co, serial 40811 Extra. Weight 49.8 g. Watch currently in working order. TIFFANY, PLATINUM AND DIAMONDS OPEN FACE SMOKING POCKET WATCH, SVITZERLAND 1910 CIRCA