OMEGA rare gents wristwatch chronometer Seamaster in 18k yellow gold reference 2521SC,self winding, Switzerland around 1952, neutral14k yellow gold bracelet, screwed down case back, silvered original duoton-dial of a Constellation with raised indices, display of hour, minutes & sweep seconds, movement coppercoloured, calibre 352 with so called hammer- self winding, 17 jewels, screw-balance, Breguet balance-spring, incablock shock- absorber, spezial precision adjustment, diameter approx. 35 mm, length approx. 18 cm, condition case 2-3, condition movement 2, total weight approx. 73g