OMEGA gents wristwatch Speedmaster Professional so called 'Moon Watch', manual winding, reference ST 145022, Switzerland around 1981, stainless steel case, screwed down case back with sea horse logo, bezel with tachometer graduation slightly dent, display of hours, minutes, constant second & chronograph, movement copper coloured, calibre 861 (base Lemania), 17 jewels, flat rim balance, flat hairspring, incablock shock- absorber, diameter approx. 42 mm, condition case 2-3, condition movement 2, property of a collector