Offers around $300 (not incl postage). Genuine Vintage 1957 Omega Seamaster Calendar. 20 jewels. Cal 503. The movement is signed "Omega Watch Co-Swiss Twenty 20 Jewels" Original dial with hour markers in nicely aged condition. Original stainless steel case also in great condition. No major signs of wear. Original crystal in clean condition. Crown however is a replacement. Dimensions are 35mm and 42mm lug to lug. A fantastic example of a 1950,s Omega Seamaster Calendar in very well kept condition. The dial really is a joy to look at.