Pun
2245
I belong to the view that a watch, unless it's vintage and parts are difficult to get, should be sent for service when it starts giving trouble.
ALS in any case provide a complete service to the watch, at a good price. Why not send only when it shows signs of needing service. Normally I've seen a watch, without rough handling, under rotation with few other good watches normally require service in 7-10 years. Others may give you their perspective as well. Regards
If the watch
By: watch-er : April 11th, 2020-09:53
is running perfectly, does not feel dry or stiff when winding or setting and has the proper power reserve I would send in at about 10 years. The modern lubricants are much better than those of years ago. The problem can be that they come back with issues ...