Do I service unworn watches?

[Andad]

Hi Closey,

Welcome to the Forum.

IMO
I would not service it. I would gift it to your son when the time comes and simply pressure test it to make sure that the seals are ok. Rolex 'o' rings are similar to the viton seals found on chemical resistant pumps and are designed to last.
The inside of a Rolex is not subject to the same changes in atmospheric conditions as a car stored in a garage might be and the new synthetic oils are excellent and will not 'throw off' or 'migrate' from bearing surfaces as older oils may have. If so why would Rolex use so many different oils inside one watch case?
Giving it a dozen winds every 3 - 4 months (just so that you don't forget that you have it) would circulate the gears and prepare it for daily wear.

Your son can enjoy the watch for years before a service would be required due to wear.