Omega Speedmaster Professional 145.022-71 ST

OMEGA Speedmaster Professional chronograph reference 145022-71ST, Switzerland around 1971, manual winding, stainless steel case including leather strap with original buckle, screwed down case back with Speedmasterlogo and engraving "THE FIRST WATCH WORN ON THE MOON", black tachymeter-bezel, original dial with tritium-indices, orig. luminous hands, copper coloured movement calibre 861, 17 jewels, precision adjustment, diameter approx. 42 mm, original glass and winding crown, condition 2, property of a collector