I prefer to work on old works. A DUROWE, Roamer or Peseux makes me happy. Why? The parts fall into place almost by themselves during assembly, and the construction is service and watchmaker-friendly. Quite a few manufacturers are now completely replacing a 7750 during service. Goes faster and is ultimately absolutely comparable in terms of costs. And the risk that the customer will come back buy fake rolex with a complaint after the service is much smaller.