A client has sent in his Rolex. It belonged to his father and means a lot to him. Two years ago it was serviced by a jeweller in Cardiff, but kept terrible time. Contacting them he got no willingness to inspect the problem. He dropped the watch and it has stopped. I doubt the movement was actually taken apart in the last service. It’s highly unlikely that amount of dirt could accumulated around the pivots in 2 years. In any case the watch looks and preforms great again.