I've recently acquired a Rolex and I need help identifying what kind it is. I looked the serial number up and it was manufactured in 1951-1952. The face reads 'Rolex Oyster-Perpetual Officially Certified Chronometer'. The 3, 6, 9 and 12 hours are also on the face. I'm not sure how to upload pictures but if anyone can help me on this I can email pictures. Thanks.