hello members, today I had a discussion with a watchmaker on the result of different services that he performed on different watches. I had noticed, that while some models are running on 1-3 seconds per day accurate after service, some differ about 15 seconds per day and some even 40 seconds per day. I was wondering why the results of the services (which were all priced similarly at around 400 euro) are so much apart. he explained that the quality of the service mainly depends on the quality of the watch he has on the table. for instance, when he works on an "unworn" 90ties speedmaster the outcome will be a lot better than if he works on a 50ties bumper that got neglected by the previous owners. it also depends on the amount of spare parts he needs to change during the service and consequently the price. do you guys think that a time deviation of 40 seconds per day is acceptable after a fresh service or is he fooling me?