Here we have a very uncommon manual winding 1960 (serviced and accurate) caliber 320 Omega chronograph in steel measuring 35mm. The steel reference 2278-3 case retains its original finish. The two register dial with rose toned markers and sword original hands is all original and rather rare; having a pulsations dial, meant for doctors. This watch has an all-dial appearance with narrow bezel, making it quite balanced and fairly large looking on the wrist. This original two-tone dial really looks MUCH nicer in person with balanced aging and a reflective quality. I really love the uncluttered and symmetrical appearance of this vintage Omega chronograph.