Accuracy change/observation...

[Wooddog44]

This is about accuracy so those "don't worry about a second or two a day" folks should go to the next thread...

Have had my Sub now since 2008. Had it serviced after a year and it has run, worn daily, approx +1.5 sec per day consistently.

Got my DJ a little over a month ago and began a "new" alternate day, wearing pattern. I keep both watches running and set but now find with 50% less "wrist time" that the Sub gains only about 1/10 of a second per day. The next experiment would be to wear the DJ (runs approx. +1.5 sec. per day) only for a week or so and compare it in a daily wear/every other day test but have yet to do that.

I direct this question to those who care... has anyone else noticed significant on wrist/off wrist accuracy variations?

[Jef_]

I purchased my GMTIIC two weeks ago, new, and is losing about 1 second per day. I don't take it off at night, but I am thinking about putting it on my night stand at night with the crown faced up to see if it evens out.

[George Spring]

Originally Posted by Jef_

I purchased my GMTIIC two weeks ago, new, and is losing about 1 second per day. I don't take it off at night, but I am thinking about putting it on my night stand at night with the crown faced up to see if it evens out.

Wind the watch 40x clockwise before going to bed and face the crown up

[77T]

I do notice better accuracy with one of my Daytona's when it's worn daily vs. in rotation with the other one. So my experience is counter to yours.

[Old Expat Beast]

Originally Posted by Wooddog44

This is about accuracy so those "don't worry about a second or two a day" folks should go to the next thread...

Have had my Sub now since 2008. Had it serviced after a year and it has run, worn daily, approx +1.5 sec per day consistently.

Got my DJ a little over a month ago and began a "new" alternate day, wearing pattern. I keep both watches running and set but now find with 50% less "wrist time" that the Sub gains only about 1/10 of a second per day. The next experiment would be to wear the DJ (runs approx. +1.5 sec. per day) only for a week or so and compare it in a daily wear/every other day test but have yet to do that.

I direct this question to those who care... has anyone else noticed significant on wrist/off wrist accuracy variations?

Presumably you leave the sub on its side, crown up? That would account for the slight slowing with less use.

[Tseg]

Depending on positioning I can create 4 second swings with my BLNR... when worn 24/7 it performs daily +1-2 SPD.

[Jef_]

Originally Posted by George Spring

Wind the watch 40x clockwise before going to bed and face the crown up

So I took it to the test last night. Instead of losing one second, it gained .5 seconds. Not quite the result I was expecting but I guess it sort of works.

[Old Expat Beast]

Originally Posted by Jef_

So I took it to the test last night. Instead of losing one second, it gained .5 seconds. Not quite the result I was expecting but I guess it sort of works.

That sounds like a perfect result to me

[Andad]

If I don't wear my Daytona its correct twice a day......

[Jef_]

Originally Posted by Old Expat Beast

That sounds like a perfect result to me

I was hoping for it to gain a whole second to compensate with the lost second of the past day.

[ABChop]

My 16700 GMT is my daily wear. It was always a few seconds a day slow.
Did about 4 rounds of golf in Hawaii in March; and now it's consistently 2 seconds a day fast. Coincidence ? Not sure but that's the only thing i can think of that would have any effect on it. I had a few wrists snappers : ) Anyway i'm happy as it's better now than it was.
I compare it to an atomic clock over a week or two...so my accuracy should be close and consistent.

[Techno]

I found out that if you wear your watch daily and for at least 10hours. The watch must have full power reserve and the watch tends to run fast. Sometime up to 10s.

At night , place the crown up

When left it on shelf for one day or more, power reserve dwindle, watch run slower significantly losing few seconds.

[Wooddog44]

Originally Posted by Old Expat Beast

Presumably you leave the sub on its side, crown up? That would account for the slight slowing with less use.

Sub "sleeps" crown up, DJ shows best timing performance "sleeping" 12 up, go figure...

[watchwatcher]

I do think my watches behave a little differently if they're just laying around vs. being on the wrist. It seems that they usually run just a tiny bit slower most of the time...but position has an effect as well.

[Friar]

From my limited experience, every watch, even with the same movement, will react differently to positional variation. My 216570 will gain about 1s/d on the wrist for 16 hours and lose about that if positioned vertically with 12 up overnight. It will gain more in all other positions. My 214270 will gain 1 to 2s/d during the day and will lose about 1s with crown up, and lose about 2s crown down. With both watches there is a 7s/d difference between the fastest and slowest position as measured on a timegrapher. You just have to experiment. But even then, so many other variables can affect accuracy day to day, so it's best to average over several days. Get to know the watch and then enjoy it.

[iclick]

Being more anal than most about accuracy, I've checked all five of my watches in six resting positions, and most tend to run slow with C^ and fast D^. If internal regulation is set close enough I can keep four of my five watches ±3 sec. or so indefinitely by positioning at night. That's not ±3 sec./day but within that tolerance for the long term. For example, the Tudor 79090 I'm now wearing was set 30 days ago and right now is at +1 sec. It's my most accurate watch, but all except the Daytona can be kept very close in this manner. The Daytona runs +5 sec/day on my wrist and fast in all positions, so it can't be self-regulated. I only wear it on special occasions, never more than a day at a time, so it doesn't really matter.

Every watch is a bit different and you'll need to put it on a Timegrapher or do manual testing to determine how each behaves.

[liuk3]

Check out the watch tracker app for your smartphone if you haven't. Costs $5 but I really like the convenience and the hookup to the atomic clock.

[padi56]

There is one problem with all the so called accuracy checking it often develops into a OCD fixation then that OCD starts to take away the pleasure of owning and wearing a Rolex watch.For any watch to perform to or inside the COSC spec truly is quite a remarkable feat considering there are 86400 seconds in a day.All Mechanical watches are noticeably affected by the gravitational pull of the earth, it only takes a performance distortion of 1/1000th% for a mechanical watch movement to be one second less accurate in a day.

[CAL3135]

Originally Posted by padi56

There is one problem with all the so called accuracy checking it often develops into a OCD fixation then that OCD starts to take away the pleasure of owning and wearing a Rolex watch.For any watch to perform to or inside the COSC spec truly is quite a remarkable feat considering there are 86400 seconds in a day.All Mechanical watches are noticeably affected by the gravitational pull of the earth, it only takes a performance distortion of 1/1000th% for a mechanical watch movement to be one second less accurate in a day.

+1 for this. And I'll admit to being close to OCD levels with mine. I'm getting better, though :)

[Tseg]

Originally Posted by padi56

There is one problem with all the so called accuracy checking it often develops into a OCD fixation then that OCD starts to take away the pleasure of owning and wearing a Rolex watch.For any watch to perform to or inside the COSC spec truly is quite a remarkable feat considering there are 86400 seconds in a day.All Mechanical watches are noticeably affected by the gravitational pull of the earth, it only takes a performance distortion of 1/1000th% for a mechanical watch movement to be one second less accurate in a day.

I was OCD about watch timing for the 1st 6+ months I had my BLNR. Between the Watch Tracker app and all kinds of positioning tests I got to know how my movement performed in various circumstances quite intimately. After months and months of 'testing' I refined performance into 3 categories:

• Extreme interventon relative to wear time/positioning = <+.5 SPD
• Minimal (nightly) positioning = +.5 to +1.25 SPD
• Worn 24/7 with so concern for accuracy/variance = +1.25 - +2.5 SPD

Finally, my timing OCD waned and now just wear my watch 24/7 and reset to atomic time a couple of times a month... I guess my remaining OCD is I still don't let my watch get more than +/- 15 seconds from atomic time... tending to set me watch 10-15 seconds 'slow' when I do reset it which give me a solid 1/2 month before it approaches +15 seconds vs. atomic time.

On one hand, while this OCD was a bit of a distraction, I now feel I have a more personal understanding of my specific watch because of my 'investment' in better understanding what made it tick. No regrets for me.