This is a 1972 vintage Omega Seamaster automatic winding chronograph. The caliber 1040 automatic is an uncommon movement variant of the Speedmaster Mark III. The 39mm gold-filled case with signed steel screw back is in very good condition for its age. The slate-grey dial with blue accents, date aperture, and inner tachymeter bezel displays very fine condition. The gold running seconds (and 24-hour indicator), exotic blue and gold 12-hour chrono register, and gold sweep seconds add a refined appeal. Please note that the airplane-style chrono hand returns exactly to 12:00 (it was not reset in the photo). The caliber 1040 automatic winding movement was amongst the most complicated ever produced by Omega. This one was recently cleaned and overhauled and is keeping time quite well. This is an uncommon Omega complication that will certainly appreciate over time.