Rolex accuracy

[Comissaria]

Whats is the Rolex aceptable accuracy?

[padi56]

Originally Posted by Comissaria

Whats is the Rolex aceptable accuracy?

The COSC spec for all movements of the Rolex size is that at time of testing the bare uncased movement performed to a AVERAGE of between -4 to + 6 seconds over any 24 hour period.Myself not too anal about time but as long as they keep around the COSC spec thats fine for me.Last time a checked my wearing watch was around two weeks ago then it was less than a minute fast.

[Magic-Matt]

Ive found it varies a lot depending on what youre doing (how active), if the watch is off the wrist, the ambience temperature, how wound the spring is etc. I generally get between what padi says, -1 to +4 per day on average. If I keep fairly still, and the watch is fully wound, it seems almost at +/- 0!

[adzman808]

my 6 day old makes between +1 and +2 per day, and -1 overnight on the dresser crown down

happy with that, but it matches standard grade eta 2824s I own...

[DJJon]

My 1-year old Cal 3135 has, from day 1, been steady at +0.7 sec/day on a winder at night and when worn all day.

That's 20 seconds per month. All buy the highest grades of quartz territory.

[bardm]

My GMT IIc usually is between 1.0 - 1,5 seconds off per 24 hours.

Lately I have not been wearing it (got an Omega for Christmas). It has been laying flat face up all the time and I have manually wined it every morning. Just for kicks I have measured it against the atomic clock and it's been consistently less than 0,5 seconds off per day! That's really insane accuracy even for Rolex

For your question: Even though Rolex is guarantied to keep within the COSC-standard I believe the COSC-standard is somewhat dated. You should expect (a modern) Rolex to keep well within that. If not I would have it regulated.

[Mickey®]

What Padi said...
AVERAGE of between -4 to + 6 seconds over any 24 hour period

[Tools]

Originally Posted by Comissaria

Whats is the Rolex aceptable accuracy?

Acceptable to who and acceptable for what ???

I don't care what the COSC specs are, I will get any Rolex I own regulated if it gets out by 5 seconds fast or 2 seconds slow in 24 hours.. I prefer them to be around 2 seconds fast or better...

[springer]

Originally Posted by tools

acceptable to who and acceptable for what ???

I don't care what the cosc specs are, i will get any rolex i own regulated if it gets out by 5 seconds fast or 2 seconds slow in 24 hours.. I prefer them to be around 2 seconds fast or better...

x2.

[mjclark32]

-4 +6, my sub is a bit fast, +3 or so

[dssxxxx]

Of all the watched I have owned, Rolex keeps the worst time.

A $5 Timex I won in college kept the best time.

[padi56]

Originally Posted by dssxxxx

Of all the watched I have owned, Rolex keeps the worst time.

A $5 Timex I won in college kept the best time.

So will most any other quartz watches no matter the make or price.

[bardm]

Originally Posted by dssxxxx

Of all the watched I have owned, Rolex keeps the worst time.

A $5 Timex I won in college kept the best time.

It's meaningless to compare an electronic quartz-watch to any mechanical watch. You don't buy a mechanical watch solely for accuracy

[esm]

Originally Posted by Comissaria

Whats is the Rolex aceptable accuracy?

have you ever been late to a meeting/missed a flight because your Rolex was not accurate?

[VADanno]

Originally Posted by esm

have you ever been late to a meeting/missed a flight because your Rolex was not accurate?

No, but I did fire someone for being late to a meeting. I questioned later whether my Rolex was off, as it gains 8 seconds a day when placed crystal up at night. It was not off by the three minutes she was late. And she had just been written up earlier in the week AND the VP Ops was the presenter at the meeting.

Since then I have reset the watch every morning when I come into the office. On travel days, I just stop the watch for 8 seconds. Also, I am testing different "resting" positions, and I'm within COSC (+4) when I store the watch crown down at night. Next week I will try crown up.

[bjpk]

I still dont understand..
So say a watch is fast 2 seconds a day then when worn for a month it would be a whole
minute out?
Is this acceptable by cosc standards?
or should it only ever be either -4 or + 6 seconds and stay within these specs for say the month period?
At the moment my sub c is about 6 seconds fast and i set the time 7 days ago.
does this mean its running aprox 1 second fast per day?

[capote]

Originally Posted by bjpk

I still dont understand..
So say a watch is fast 2 seconds a day then when worn for a month it would be a whole
minute out?
Is this acceptable by cosc standards?
or should it only ever be either -4 or + 6 seconds and stay within these specs for say the month period?
At the moment my sub c is about 6 seconds fast and i set the time 7 days ago.
does this mean its running aprox 1 second fast per day?

See post 2. Your watch is within COSC.

[padi56]

Originally Posted by bjpk

I still dont understand..
So say a watch is fast 2 seconds a day then when worn for a month it would be a whole
minute out?
Is this acceptable by cosc standards?
or should it only ever be either -4 or + 6 seconds and stay within these specs for say the month period?
At the moment my sub c is about 6 seconds fast and i set the time 7 days ago.
does this mean its running aprox 1 second fast per day?

Well I would have thought that was perfectly obvious you don't even need a mathematician to work that one out.The COSC spec like I posted in the second post is that the watch should perform to a AVERAGE of between -4 to + 6 seconds a day over a 24 hour period or better.I cannot put it any plainer than that,and your watches is well inside that, remember there are 86400 seconds in 24 hours and.And no purely mechanical watch at any price or brand will keep 100% perfect time.

[T. Ferguson]

Originally Posted by bjpk

I still dont understand..
So say a watch is fast 2 seconds a day then when worn for a month it would be a whole
minute out? YES.
Is this acceptable by cosc standards? YES.
or should it only ever be either -4 or + 6 seconds and stay within these specs for say the month period? NO.
At the moment my sub c is about 6 seconds fast and i set the time 7 days ago.
does this mean its running aprox 1 second fast per day? YES.

A watch that is 2 seconds a day off (+-) is 99.8% accurate. In all seriousness, if that's not acceptable then a mechanical watch is not for you.

If you have a Rolex that is not running within COSC spec it can be regulated to do so.

[DJJon]

Originally Posted by T. Ferguson

A watch that is 2 seconds a day off (+-) is 99.8% accurate. In all seriousness, if that's not acceptable then a mechanical watch is not for you.

If you have a Rolex that is not running within COSC spec it can be regulated to do so.

NO NO NO NO

2 seconds out per day is 99.998% accurate ! ! !

[T. Ferguson]

Originally Posted by DJJon

NO NO NO NO

2 seconds out per day is 99.998% accurate ! ! !

Ooopsy, I must have been spell checking my words when I should have been checking my numbers. Meant to type 99.9%. Thanks for the correction.

[Venusfly]

Originally Posted by T. Ferguson

A watch that is 2 seconds a day off (+-) is 99.8% accurate. In all seriousness, if that's not acceptable then a mechanical watch is not for you.

If you have a Rolex that is not running within COSC spec it can be regulated to do so.

X2

[Czechman]

My lowly pre-cert 17000 gains 2 seconds a month.





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[west8720]

+4 seconds a day for me. So when I set my time, set it few minutes late... :)

[Armyguy03]

I set my SS Sub to time.gov on 18DEC12 at 1934. 18 Days later (I just checked), my watch is 32 seconds fast. So, I gained a 0.5625 seconds per day, but will note that this fractional second gain occurred some time after 21DEC12, when I stopped checking my watch like a mad scientist; as of then it was deadly accurate. Is this acceptable?

[Czechman]

Originally Posted by Armyguy03

I set my SS Sub to time.gov on 18DEC12 at 1934. 18 Days later (I just checked), my watch is 32 seconds fast. So, I gained a 0.5625 seconds per day

Actually your watch gained 1.78 sec per day. That's 32 divided by 18, not the other way around.





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[Mickey®]

If I really had to know the time I'd buy I'd wear this....

[Andad]

Originally Posted by Mickey®

If I really had to know the time I'd buy I'd wear this....

Or this when you lose your signal Mickey.

[How]

As long as it's within COSC tolerance, (-4/+6 secs a day) it's fine.

If not, then it's not performing as it promised (after all, that's what SUPERLATIVE CHRONOMETER OFFICIALY CERTIFIED means) take it back to your RSC to have it regulated.

[connorperson]

Those arent quite the standards -4/+6

if you look that is what the watch should be at the worst

at its best it should be +/-1

see http://www.chronocentric.com/watches/accuracy.shtml