Someone on the Swedish watch forum klocksnack.se told the following interesting and puzzling story.
In 1991, a Rolex TT DJ36 was purchased. It was used daily for about a year and then sat in a chest of drawers for over 25 years. Since it had been unused for so long, the owner took the watch to one of Sweden's most reputable watchmakers (Nymans ur) and asked them to assess the need for a service, and was then told that the watch was running so well that there was no need for service. N