Omega A stainless steel chronograph wristwatch with registers mvt 48338639 case 1450022 3450022 Speedmaster circa 1990, cal. 861 manual winding movement, fully jewelled, black dial, luminescent baton indexes, three subsidiary dials for constant seconds, 30-minute and 12 hour registers, stainless steel tonneau-shaped case with engraved inscription The First Watch worn on the moon Flight- qualified by Nasa for all manned space missions, black tachymeter bezel, two round chronograph pushers, downturned lugs, screw-down back, case, dial and movement signed with Omega buckle, diameter 42 mm.