Hello, I recently (Sept) purchased a new 5146J...am very happy to have my first PP. I wear it all the time except in water. I have heard that Patek's are serviced at the factory and require many weeks for the roundtrip. Do I need to have this timepiece regularly "serviced", or just when there is a problem? ( I work in an office-like setting, so no hard jarring exposures to the watch, I take it off to exercise, etc.) Thanks for your input.