That's not a very smart way to test a watch whether it's time for servicing. The water tightness could be off and your watch could still runs fine for sometime. Only later the build up of moisture will ruined the gears or worse cause corrosion inside the case.
How about the wear and tear of the rotor?
If you really wear ur watch daily this is the first thing to go. As long as u wear it daily there won't be any accuracy problem even if something happens to the automatic winding system. What happens is because the barrel is constantly being wound so there is a consistent force being feed to the balance. What we don't see is the gears and the shaft being damage day by day. Will it pass the damages to the other gears? I don't know, hopefully not.
There's an honest watchmaker I trust gave me this advice.
"As watchmaker what we try to achieve is to ensure all the parts are running coherently. In an ideal situation we love to see all the parts "aged" (wear & tear) at the same time but it's almost impossible so what we do is we try to replace as few parts as possible but really change those that have been heavily worn. The only way to do this is routine service and testing."
I ask if not then what? His reply
"Then you have a watch where some parts that by nature worn faster than others (i.e. winding gears) and when the watch is not service over a period of time then the tooth profile of the gears will change (metal grinding on metal). It'll "eat" into other gears as well damaging other gears which usually don't require much replacement."
Then? I asked. His further elaborate
"Then the whole watch movement got more damages it should resulting major overhaul or major change movement parts."
While I understand some won't care what kind of movement that's in their watch as long as it's the latest and the best technology. I'm a vintage collector at heart so I would hate to see a latest state of the art automatic winding movement in my vintage manual winding chronograph. Like putting an electronic control V6 in a 1970 SL300.

It's not my intention to frighten or push any of you to service your watch but I would hate to see any of your watch is damage due to minor servicing issues/cost.
Routine change of oil and of O-ring don't cost that much. Maybe you won't have a extended warranty period but it guarantee the watch to have a long life. We all wish to past down our watches as heirloom. Better make sure by the time our next of kin don't suffer from a high bill of servicing the watch.

If it cost this much now it will only cost more in the future.

Regard
Tyler
Hi sm, if its still running within cosc spec i think its fine . I send a sub to Rsc after 9 yrs. n they just clean ,re lube, changed all O rings n that"s it.