GRUEN WATCH CO precision pocket watch movement, Switzerland around 1920, in on both sides glazed test-case, silvered metal dial with Arabic numerals, blued cathedrale-hands, high-quality lever movement with compensation -balance & Breguet balance-spring, 3 screwed chatons, lever & escape wheel under endstones,precision adjustment, adjusted to all positions, 21 jewels, diameter approx. 42 mm, winding-staff has to be replaced, overhaul recommended at buyer's expense, condition 2