40 turns slows my watch down!

[mrricks]

3 month old new YM 116622, arrived from TS running, wore it immediately, (disabled and not very active), put on winder nightly for 700-800 rotations. Running about a half second slow daily. Come to December 1, set date, and since I had the crown pulled out, gave it the forty full turns, something I almost never do.
Now it’s running one and a half seconds slow.

What happened?

Yes, I know it’s within spec., but liked it better at only half second slow.

[schoolboy]

Hmm

I’m curious to see what other members think as well.


Sent from my iPhone using Tapatalk

[klenboy]

Perhaps try storing overnight (off the winder) flat w/ dial facing up. It will speed it up. Observe from there. But 1spd in any direction is very very good!

[watchwatcher]

The "emptiness" of the power reserve can actually make your watch run a little faster. So, when you topped off the reserve, you restored the watch to its true timekeeping settings.

But really...is .5 second/day worth the concern?

[Likestheshiny]

Yeah, it's not that your watch is running slower with a full PR -- it's that your watch runs a little fast when the PR is low. When there's less power pushing the movement, each tick is a teeny tiny bit shorter, which speeds up the watch.

So, you can either try to keep the PR low, find a night-time position that speeds it up a little to compensate, or convince Rolex to regulate the watch. They might, actually, since consistency over the PR is supposed to fall within a certain range.

[mrricks]

Originally Posted by watchwatcher

The "emptiness" of the power reserve can actually make your watch run a little faster. So, when you topped off the reserve, you restored the watch to its true timekeeping settings.

But really...is .5 second/day worth the concern?

Actually one second difference, and not really a concern, just wondering why the change.

Just for curiosity sake, I’ll let it run down and see if there’s any difference.
Thanks for the information.

[MikeyV]

Same thing happened to mine.

Bought new DJ41 in late June, and basically just wore it. It ran 1/3 second fast a day, consistently for 2 months.

I gave it a full wind, and it runs a little over 2 seconds slow a day now. Went on vacation, let it die, wound it up, same thing, a bit over 2 seconds a day slow.

It's been exactly a week (7 days since I wound it) it's about 17 seconds slow.

Not a biggie, but it is weird. It does make sense though.

Anyone think that Rolex sets these to run at minus 2 per day, expecting them to, as they age and lose amplitude/speed up, to move to spot on and then eventually plus 2 a day?

Seems plausible. They're very consistent, despite being a bit slow. Consistently slow. :)

[mrricks]

My 1680 Sub ran about 3 seconds fast for forty years. Never wound it, lap swam regularly so it didn’t need a hand wind. When I began to rotate with a second Rolex, it was on a winder for 750 rotations on days it wasn’t worn. When I retired it, it was about 3 minutes a month fast. Excellent performance IMHO.

[broken_link]

It seems like maybe the air pressure or humidity may have some effect on the watch. It’s waterproof but can the air still get in/out?

I have also noticed that the rate deviates a little bit from the trend every time I set the date.

I don’t wind my GMT, but have brought it a few times to the AD and they wound it. Seems to be the watchmaker habit. It appears to have affected the rate a bit as well.
I was checking the rate every day so it is pretty solid evidence I have.

[peterskinner]

They're mechanical watches running superbly well; give them a break.....or buy quartz. The precision Rolex achieve is remarkable,,but always limited by the nature of the beast.

[mrricks]

Originally Posted by peterskinner

They're mechanical watches running superbly well; give them a break.....or buy quartz. The precision Rolex achieve is remarkable,,but always limited by the nature of the beast.

Didn’t complain, just looking for info, and I got some.

Maybe you missed my statements:”Excellent performance IMHO”. “not really a concern “.

[No SUBctitute]

Originally Posted by mrricks

3 month old new YM 116622, Running about a half second slow daily. gave it the forty full turns, something I almost never do.
Now it’s running one and a half seconds slow. What happened?

Originally Posted by MikeyV

Same thing happened to mine. Bought new DJ41 in late June, and basically just wore it. It ran 1/3 second fast a day, consistently for 2 months.I gave it a full wind, and it runs a little over 2 seconds slow a day now.

Very interesting. I had never heard of this.

Originally Posted by MikeyV

Anyone think that Rolex sets these to run at minus 2 per day, expecting them to, as they age and lose amplitude/speed up, to move to spot on and then eventually plus 2 a day?

Interesting theory, but my Sub was running about +1.6 sec/day straight out of the gate. And still running that about 6 years later.

Originally Posted by Likestheshiny

Yeah, it's not that your watch is running slower with a full PR -- it's that your watch runs a little fast when the PR is low.

Um.....isn't this the same thing?

Originally Posted by watchwatcher

The "emptiness" of the power reserve can actually make your watch run a little faster. So, when you topped off the reserve, you restored the watch to its true timekeeping settings.

I never knew this!

Originally Posted by watchwatcher

But really...is .5 second/day worth the concern?

I don't think anyone is "concerned." Just interested in how watches work.

[Andad]

Would a fully wound watch have more amplitude and this slows it down.

Would an almost unwound watch have less amplitude and this speeds it up?

Or does air pressure and humidity seem a more likely cause?

Posts 3 & 4 sort of nailed it.

[Tools]

Originally Posted by directioneng

Would a fully wound watch have more amplitude and this slows it down.

Would an almost unwound watch have less amplitude and this speeds it up?

. . .

Yes !!!