ROLEX open face nickel military pocket watch of the British army, Switzerland around 1920, screwed down case, case back with military engraving, enamel dial with Arabic numerals, blued spade hands, constant second at 6, silvered movement calibre 548, fausses cotes decoration, screw balance with Breguet- hairspring, 15 jewels, movement, case & dial signed, diameter approx. 52 mm, condition 2-3