Omega Seamaster chronometer grade watches are an uncommon bird. This vintage Omega watch has a fabulous slate gray SPARKLE finish dial with quickset day/date aperture, black inset steel baton markers and hands. The movement is the caliber 751, 24 jewel and adjusted to 5 positions and temperatures-just serviced and accurate. The steel case is large; measuring 36.5mm. with some minor marks from normal use. The watch looks MUCH better in person, as my brightly lit close-ups pic show all the detail. The correct Omega winding crown is installed. The mark on the crystal are not there, as we installed a new crystal after the photos. This watch was made for the Japanese market, making it a collectable piece.