since as far as Panerai is concerned, it was ALREADY sold to a 3rd party, right? The A.D. will have to provide you with their guarantee (unless they can "reactivate" the original one, through Panerai). Furthermore, a watch is not an automobile. It doesn't need "regular service", oil chance and engine tuneup Lollllll Until it works, it DOES work, when it doesn't work or start giving you problems, you take it to the dealer to be fixed