Omega Seamaster Automatic "Bamper" Watch - 1954 - A Classic Swiss Timepiece. Reference Number: 2577 1954 Dimensions: 34 mm Case Stainless Steel Case Back Screw-fastened, bearing the Omega Seamaster signature Dial Hand-set hour markers and baton hands Glass Hysalite Glass Strap Leather Function Movement Type Hand-wound (Mechanical) Caliber Number: 354 Serial Number: 13722533 17 Jewels Central Seconds Hand This watch comes with an additional strap and a classic pin buckle. This watch is for sale in excellent condition, has recently been serviced, and is ready for everyday wear.