Average run time when not used.

[jnmarshall]

Just wondering what the average run time of a perp watch should be when it's not being worn? Mine lasts about 12 hours which seems kind of short. I'm debating about having it serviced this year. When it is worn it keeps perfect time. I only need to set it during months that do not have enough days.

[Balboa]

A fully wound watch should run about 40-48 hours. Wind your watch 40-50 turns and then see what your reserve time is. Just wearing your watch does not insure that is fully wound. If your reserve is still around 12 hours, you are probably due for service.

Mark

[jnmarshall]

I'll try that. I've never wound it more then about 20 winds. I did find a note somewhere that the watch should last between 40-100 hours. So 12 or less would be quite low!

[Tools]

If you just take it off your wrist and watch it run down and it takes 12 to 20 hours, it just means that you have not been active enough to top off it's reserve... nothing more..

As said... you need to ensure it is fully wound (at least 40 winds), then let it run down to check it's power reserve..

[Skutt50]

It could also be the winding mechanism.

My DJ ran 48 hours when manually wound but only some 6-8 hours when wound on my arm. The winding mechanism was clogged with oil etc. but after service it works perfect i.e. I get some 48 hours reserve just by wearing it.

[jnmarshall]

I wound it 40 times Friday morning. Took it off friday evening and it stopped today just a little before noon. So it ran about 30 hours. Still seems a little short. Sounds like service time. I hope having it serviced doesn't mess up the perfect time keeping this watch normally gives me.

[Tools]

Your math seems to be different than mine..

[sakuraba]

Originally Posted by jnmarshall

I wound it 40 times Friday morning. Took it off friday evening and it stopped today just a little before noon. So it ran about 30 hours. Still seems a little short.

How about winding it and then leaving it alone. I'm guessing that after you wound it int eh morning, you did not have significant activity the rest of the day to keep the power reserve topped off before you took it off in the evening.

My indicator of a need for service is accuracy. If performance is out of COSC spec then it's time.

[jnmarshall]

Originally Posted by Tools

Your math seems to be different than mine..

You are right It was more like 42 hours which sounds better!

[Tools]

Originally Posted by jnmarshall

You are right It was more like 42 hours which sounds better!

That sounds much better........ You might be a candidate for a winder on the weekends or nights...

or, perhaps just a full wind each time you change the date if it's a date model.......

Now that I'm a bit older and not as active, sometimes, I just let my arm hang down and rotate the wrist a half dozen times - when I think of it.......

[jnmarshall]

I've been thinking of a winder. My wife and I own pretty much the same watches (his&hers) and we usually don't wear it on the weekend.