Omega Speedmaster Professional: a gentleman's stainless steel chronograph bracelet watch, c.1973, case ref. 145022-74 ST, the circular black dial with luminous markers and hands, three sub-dials recording hours, minutes and seconds, 17 jewel manual wind movement, signed Omega, numbered 31312822, circular case with tachymetre bezel, the back signed 'The first watch worn on the moon/flight-qualified by NASA for all manned space stations', dust cover, Omega mark to winder, case diameter 40mm approximately not including winder. See illustration