Omega Speedmaster Wristwatch with chronograph, stainless steel, lever movement, caliber 321, movement number 20522015, around 1964, shock protection, 17 jewels, stop mechanism via ratchet wheel, black dial with 3 auxiliary dials for 30-minute and 12-hour counters, small second, tachymeter scale, reference S105.003 -63, movement cover, diameter approx. 40 mm, 69.9 g, lume somewhat worn
