David Weber is happy. He has cleaned and regulated the customer’s watch, fitted and aligned the spring, and checked all the adjustments. He has assembled the movement and rechecked its accuracy over the course of a test run of several days. Now he is putting the watch back into its case. If it had been necessary, he would also have filed the bevelled edges and renewed the polish. He is trained to do so. In 2008 he passed his final examinations at the Lange Watchmaking School with flying colours.