my 1939 Rolex that ran twice the speed it should, had a complete overhaul at central watch. After a couple of weeks it runs like it's brand new and the casing is all polished up. And they even found me an original crown, it looks so good I barely dare to wear it. They also threw in a complimentray new leather band, after getting a watch like this repaired I am convinced it will run another 75 years.thanks