1991 Rolex Sub

[PACEVIPER]

Hello guys. New forum member here at least as far as posting goes. I bought new in 1991 a 16610 Sub. It admittedly is a safe queen with very little actual wear time. It has never been serviced and it keeps +or- 1 sec a day. I have decided to send it in for service when it gains or losses 2 sec or more a day as my local watch guy says he wouldn't touch it as no one else could regulate it during a service any better and most likely not as good. Am I following a reasonable course or should I send it in ASAP...........Thanks Jimmy