Omega Speedmaster Professional Mark III Chronograph Wristwatch, stainless steel, automatic, rose gold-plated lever movement number 31645171, caliber 1040, stop function via rocker, fine adjustment, 22 jewels, black dial, luminous lines, date, two auxiliary dials for 12-hour counter, small second, 24-hour display, tachymeter, around 1970, diameter approx. 41 mm, model number 176.002, folding clasp 152.2 g, partly revisedøx
