Vintage Omega Seamaster Calendar Automatic wristwatch from 1958: Movement: caliber: 503, twenty 20 jewels, signed OMEGA Watch Co. SWISS Serial number of the movement: 16263748 (dates the watch to 1958) Country Of Manufacture: Switzerland Crystal: Acrylic Dial: original, silver, gold plated baton hour markers, with original patina Hands: gold-plated, Caseback: signed with Seamaster Waterproof Band Type: brand new, black, genuine leather strap with buckle matched to the strap Band Length: 20 cm including watch Special features: central second, date at 3 o'clock Silver color dial with applied gold-plated baton hour markers and gold-plated hands is in original condition. There is original patina on it. It's not so visible in reality. Stainless steel case has some slightly visible traces of use. There are Omega sign and reference number on the inner side of caseback. SWISS movement signed OMEGA WATCH Co SWISS is in very good working order. It keeps accurate time well. It's after watchmaker's service. DIMENSIONS: Diameter without crown: 34 mm Diameter with crown: 37 mm Lug to lug width (lenght): 42 mm Thickness: 11 mm Lug width (strap): 18 mm Tracked and insured shipping 30 EUR ( European Union ) 50 EUR ( Worldwide )