OMEGA Constellation Calendar chronometer wristwatch, Switzerland around 1960, self winding, reference 2943 2 SC, stainless steel case with gold cap, screwed down case back with representation observatory & dedication, silvered dial patinated/spotty, gilded indices, luminous hands, date at 3, copper coloured movement calibre 504, 24 jewels, 5 adjustments, diameter approx. 35 mm, strong signs of use, condition 3