Rolex ain’t kidding when they claim...

[G'ed]

tighter spec than COSC with -2/+2. For my past watches with 31XX generation movement, timekeeping over certain days deviate average of 0-2 seconds which is superb compared to rest of the brand but daily deviation around 3-4 seconds sometimes depending on rest position and power reserve.

The newer movement (at least for the Sky D), is consistently 0 Sec deviation EVERY day for past 2 months, regardless of resting position. What sorcery is this??

[Maiden]

Rolex movements are superb. I had a 1980 16014 and the 3035 movement was bang on for over 2 years. I moved it on but I bet it is still just as accurate. My two modern subs are both within the -2 +2 spec and were purchased prior to Rolex tightening its standards. My 1990 Day Date consistently runs +3 seconds a day no matter how I position it. Bad Boy! But I can live with that.

Bottom line Rolex makes a fine movement.

[RightYouAreKen]

My month and a half old 114060 with the 3130 movement is running consistently better than +0.5 s/d. In the last week, it's gained only 2 seconds. In the first two weeks I owned it, it gained only 5 seconds total.

Heck, that's nearly more accurate than my DW5600 quartz G-Shock which runs at +0.3 s/d.

Pretty remarkable.

[16610v]

My friend got a brand new pm daytona with +6/day.

[Speed]

Glad folks are happy with their “accuracy” but not knowing how folks measure these averages...I wonder how these watches are truly performing?

Over nearly 10 years of ownership, I’ve never timed a Rolex, but I might for grins if there was an (easy) way I could mirror COSC process.

[rockmastermike]

I'll add a couple more data points.....

I set to time.gov on Monday (12th) and thru Thursday (15th) my

116660: -.05 s/d
216570: -3.5 s/d

note: equal wrist time and various resting positions

[Mystro]

I most definitely see a difference with the new standard compared to the standard COSC.
Both my modern Rolex LVc/DJ2 keep less than a second a day.

[Chadridv]

I've been able to keep all my newish Rolex within +/- 1 with a little bit of positional regulation over night. They have been superb!

[jackcarls0n]

It maybe accurate in terms of seconds but takes for ever to change the date. It's annoying and I didn't expect Rolex watch to be less than perfect, especially when Rolex claims it does it in few milli seconds. My Tissot and Seiko changes right at the second its past midnight.

My Daytona is keeping good time. But I don't wear it everyday!

[pickettt]

I'm never late to my appointments, everything else is gravy. So far, both my watches have been +/- 3 seconds per day, anything better than that is just academic.

[Chiboy]

My Daytona is 4 1/2 seconds ahead after 60 days! I compare the time to time.is. That's pretty incredible from an engineering standpoint, and kind of nice if you wear a watch every day. If you are sitting watches for months at a time and then wearing them for a day or a week, I admit it really isn't noticeable or helpful.

[Reddy_Kilowatt]

I always feel like these threads bring out those who want to post about their good fortune, but the rest of us don't bother. For any newbs, don't be shocked if your watch isn't within 0 seconds of actual time after a month or two. Don't even be surprised if you're off by more than COSC. My Explorer 2 is +1.5 after a service. My GMT (gone) was about +6. My Datejust is +20 after a RSC service and is going back fro regulation. And my new Omega seems to be under a second per day slow.

These things can be all over the map. Just my 2 cents.

[danlar]

This inspired me to check the time at NIST against my DJ41. Flawless mechanical timekeeping.

[Watchmanaz]

The old saying you get what you pay for!!!!

[amh]

I use this site:
https://time.is/

My rolex is more accurate than all the quartz clocks around the house and those in our cars. Only our Internet connected devices are more accurate and also knew when to "Spring Forward" a few days ago!

[chronoman]

So when did they come up with the new standard?
Since the first of the year I've done 3, twenty day trials:
The 1st = +1.725/day.
The 2nd = +2.38/day.
The 3rd = +3.8/day.
Seven year old Daytona. Probably time for the oil can

[Coop13]

Originally Posted by jackcarls0n

It maybe accurate in terms of seconds but takes for ever to change the date. It's annoying and I didn't expect Rolex watch to be less than perfect, especially when Rolex claims it does it in few milli seconds. My Tissot and Seiko changes right at the second its past midnight.

My Daytona is keeping good time. But I don't wear it everyday!

Speaking of Daytona the date on mine is NEVER correct!

[jrs146]

Mine all keep time close enough for me not to care to measure the accuracy. Not knocking those who do. It’s just a rabbit hole I’m not wanting to go down


Sent from my iPhone using Tapatalk

[SeaAndSky]

Originally Posted by Speed

Glad folks are happy with their “accuracy” but not knowing how folks measure these averages...I wonder how these watches are truly performing?

Over nearly 10 years of ownership, I’ve never timed a Rolex, but I might for grins if there was an (easy) way I could mirror COSC process.

There is. Set it at the begininning of the month. Compare to indicated time at end of month. Divide by number of days. Do so for several months if desired to verify first month’s data. Easy.

The mechanical engineer in me was curious so that’s whatI did. Well within COSC at minus 2.5 a day plus or minus a tenth of second. Same time my daily wearer 116710 has kept all along for four years. These truly are superb movements.

[Speed]

Originally Posted by SeaAndSky

There is. Set it at the begininning of the month. Compare to indicated time at end of month. Divide by number of days. Do so for several months if desired to verify first month’s data. Easy.

The mechanical engineer in me was curious so that’s whatI did. Well within COSC at minus 2.5 a day plus or minus a tenth of second. Same time my daily wearer 116710 has kept all along for four years. These truly are superb movements.

Ok...now if everyone who tosses numbers about on the inter webs did their math this way - you might have some comparables. I’m betting not all folks do this.

[G'ed]

Originally Posted by Reddy_Kilowatt

I always feel like these threads bring out those who want to post about their good fortune, but the rest of us don't bother. For any newbs, don't be shocked if your watch isn't within 0 seconds of actual time after a month or two. Don't even be surprised if you're off by more than COSC. My Explorer 2 is +1.5 after a service. My GMT (gone) was about +6. My Datejust is +20 after a RSC service and is going back fro regulation. And my new Omega seems to be under a second per day slow.

These things can be all over the map. Just my 2 cents.

As usual, there’s always outlier even for those passed QC before leaving factory due to numerous reason. I owned and flipped more than 10 crown, 1 of them is not keeping good time, a Sub with 3135. Their movement is very dependable in my book.

However the same can’t be said about AP. My 15400 still with SC for past 5 months....

[lecorsaire]

Even my dad who looked down on Rolex as too ordinary and watches chosen by nouveau riche types, admitted that his Rolexes have much better accuracy than his beloved Breguets. He started using a 116528 while his YG Breguet Marine was away for service and was really impressed with the superior accuracy.

[Cibbersicks]

Before I bought my first Rolex I was told by a few different owners that “they’re great, but not that great at keeping time” so I always assumed as such, until I bought my 116610LV last year. What a load of twaddle, it’s the best timekeeper of any of the mechanical watches I’ve owned.


Sent from my iPad using Tapatalk

[DGB]

My Sub pre ceramic looses 1 second every month.

[jackcarls0n]

Originally Posted by Coop13

Speaking of Daytona the date on mine is NEVER correct!

This was in reference to the SkyDweller I got! I meant for time keeping Daytona is doing fine and doesn't has date so that is good. SkyD has a date feature that isn't as good!

Sent from my ONEPLUS A5000 using Tapatalk

[G'ed]

Originally Posted by jackcarls0n

This was in reference to the SkyDweller I got! I meant for time keeping Daytona is doing fine and doesn't has date so that is good. SkyD has a date feature that isn't as good!

Sent from my ONEPLUS A5000 using Tapatalk

As a SkyD owner, I agreed to that. It’s wrong once a year

[aquatimerfla]

My ETA 2892 based IWC Aquatimer keeps a consistent 1 sec per day

My Valjoux 7750 based PAM 025 keeps a consistent +2 per day

Just saying

[DoctorA]

Originally Posted by 16610v

My friend got a brand new pm daytona with +6/day.

So much for quality control! Which makes +6 within their standards!!

[jstan9]

Originally Posted by Speed

Glad folks are happy with their “accuracy” but not knowing how folks measure these averages...I wonder how these watches are truly performing?

Over nearly 10 years of ownership, I’ve never timed a Rolex, but I might for grins if there was an (easy) way I could mirror COSC process.

It’s fairly easy to do. Make sure your iPhone is synced up with time.is. Turn on the ringer. Open the watchville app, select the clock. Hack the watch on an exact minute, and when watchville chimes at the 60sec position, press the crown. I’m not obsessive but this forum made me curious. In 128 days my 8 month old BLNR gained a third of a second per day.

[AEC]

My 114060 performs like this, too. I bought it in February. I'm very pleased.

Originally Posted by RightYouAreKen

My month and a half old 114060 with the 3130 movement is running consistently better than +0.5 s/d. In the last week, it's gained only 2 seconds. In the first two weeks I owned it, it gained only 5 seconds total.

Heck, that's nearly more accurate than my DW5600 quartz G-Shock which runs at +0.3 s/d.

Pretty remarkable.