My GMT2 Im REALLY SHOCKED...Never Have I Had A Rolex...

[Gold Crown]

keep such good time. Never not even Bluesy that gains about 11 seconds a day and Rolex has said that thats within spec. This one is spot on a W series maybe 14 years old and never been serviced but worn seldom but is like a quartz watch as far as accuracy its amazing. I have owned many a Rolex in my day and I have never had one be this spot on.

[diablojota]

Originally Posted by Gold Crown

keep such good time. Never not even Bluesy that gains about 11 seconds a day and Rolex has said that thats within spec. This one is spot on a W series maybe 14 years old and never been serviced but worn seldom but is like a quartz watch as far as accuracy its amazing. I have owned many a Rolex in my day and I have never had one be this spot on.

Rolex said 11 seconds per day is within spec? That's not even close to COSC spec! I would not take that as an answer.

[Watchdog]

Always glad to hear about a watch that is "spot on." Some folks don't care as much as others about accuracy. But I do.

I love to see it as accurate as possible and perfect is as good as it gets.

Of course, getting it to within COSC alone, even a couple seconds off a day, is itself a technological marvel.

[Gold Crown]

Originally Posted by diablojota

Rolex said 11 seconds per day is within spec? That's not even close to COSC spec! I would not take that as an answer.

Yes the Rolex service center said +/- 12.5 seconds a day is considered within spec.

[Watchdog]

Originally Posted by Gold Crown

Yes the Rolex service center said +/- 12.5 seconds a day is considered within spec.

RSC is not telling the truth.



COSC is -4 to +6 seconds per day.

[padi56]

Originally Posted by Gold Crown

keep such good time. Never not even Bluesy that gains about 11 seconds a day and Rolex has said that thats within spec. This one is spot on a W series maybe 14 years old and never been serviced but worn seldom but is like a quartz watch as far as accuracy its amazing. I have owned many a Rolex in my day and I have never had one be this spot on.

Yes many Rolex watches keep amazing time and without a parachrome hairspring.And as others have pointed out the COSC SPEC IS -4+6 average over 24 hours.But truth be told nearly any modern movement today could meet the now quite antiquated COSC test with just a bit of careful regulation.

[diablojota]

Originally Posted by Gold Crown

Yes the Rolex service center said +/- 12.5 seconds a day is considered within spec.

That's a bunch of garbage! I'd call back and talk to a manager or supervisor. 11 seconds a day is way wrong.

[Gold Crown]

Originally Posted by kingkongkelley

RSC is not telling the truth.



COSC is -4 to +6 seconds per day.

Click on this and read on:

http://aandewatches.info/?p=318

[padi56]

Originally Posted by Gold Crown

Click on this and read on:

http://aandewatches.info/?p=318

Never believe most of what you find on the net,the spec for any Swiss chronometer that includes Rolex is -4 +6 seconds over 24 hours thats a fact.

[2th Dr]

Where did they get +/- 12.5 sec/day?
They're WAY off! As kingkong said, COSC is -4 to +6 per day.

[Gold Crown]

Originally Posted by padi56

Never believe most of what you find on the net,the spec for any Swiss chronometer that includes Rolex is -4 +6 seconds over 24 hours thats a fact.

Not only is it on the net but I was also told this by the NYC service center. -4 to +6 is Ideal, my guess the "ideal" is not usually the "norm" however.

[diablojota]

Originally Posted by Gold Crown

Not only is it on the net but I was also told this by the NYC service center.

Padi is absolutely spot on. This goes outside of COSC specs and that's what the movement is rated at. This is not acceptable at 11 seconds for a COSC certified movement. For a non-COSC movement (even though they're the same), that may be the case, but this is supposed to be a -4 to +6 range not a 5-7 minute range per month. Like I said, you need to call them back and ask for a supervisor, this is completely bogus and they may use it as a deterrent just so they don't need to adjust the watch.

[lawyerwatchfan]

Originally Posted by Gold Crown

Not only is it on the net but I was also told this by the NYC service center. -4 to +6 is Ideal, my guess the "ideal" is not usually the "norm" however.

Astounding. What's up the the NYC RSC?

[Gold Crown]

Originally Posted by diabolical

Padi is absolutely spot on. This goes outside of COSC specs and that's what the movement is rated at. This is not acceptable at 11 seconds for a COSC certified movement. For a non-COSC movement (even though they're the same), that may be the case, but this is supposed to be a -4 to +6 range not a 5-7 minute range per month. Like I said, you need to call them back and ask for a supervisor, this is completely bogus and they may use it as a deterrent just so they don't need to adjust the watch.

http://aandewatches.info/?p=318

I don't know but click above and do the math. I have owned many Rolex and never in my life have I had one that accurate. This GMT2 however comes mighty close. Its the exception to the norm in my experience with Rolex however.

[diablojota]

At +6 seconds per day for 30 days (typical number of days per month) leaves you with a 180 seconds or 3 minutes per typical month. 5-7 minutes is outside of COSC spec.

[AndersB]

Could it be that the -4/+6 COCS specification only applies to brand new watches leaving the factory and that the -/+12.5 interval is an informal Rolex specification applied to cirulated watches?

[diablojota]

Originally Posted by AndersB

Could it be that the -4/+6 COCS specification only applies to brand new watches leaving the factory and that the -/+12.5 interval is an informal Rolex specification applied to cirulated watches?

Short answer is No.

[Gold Crown]

Originally Posted by diablojota

Short answer is No.

The only thing is not many of them out there are really that accurate. That I know of anyway.

[s2kev]

Originally Posted by Dante72

My Explorer II which was purchased in 2002 has been within -2/+2 per day for almost 7 years now. COSC timing is trivial for any modern ROLEX. IMO any modern ROLEX should be within 3 seconds a day.

+/- 12.5 seconds a day is unacceptable.

I agree. The two Rolex's I've owned were always within 3 seconds/day and I'd be unhappy with anything otherwise.

[diablojota]

Originally Posted by Gold Crown

The only thing is not many of them out there are really that accurate. That I know of anyway.

My Rolex is pretty much spot on. My breitling is around +4. Both are COSC. I'd say that's pretty accurate.

[diablojota]

Originally Posted by Dante72

My Explorer II which was purchased in 2002 has been within -2/+2 per day for almost 7 years now. COSC timing is trivial for any modern ROLEX. IMO any modern ROLEX should be within 3 seconds a day.

+/- 12.5 seconds a day is unacceptable.

I'm going to up the ante here, any modern automatic movement from a reputable manufacturer (Rolex, PP, even ETA, etc.) should be able to be within COSC specs without question.

[luke2261]

Well, if it ever gets out of sync, take it to the shop....it's time........I wore my GMT II for 10 years before I ever had to wind it.......some watch repair guy suggested that I become more active....it was fine, Ha!

[NJSub]

Yeah, within the COSC spec is a requirement. It's what we pay for. Nothing wrong with expecting it!

[Rolex116520]

Originally Posted by Gold Crown

The only thing is not many of them out there are really that accurate. That I know of anyway.

My SDDS lost less then a minute in about 60 days and I do not wear it all of the time ( usually when I come home after work and weekends / holidays )

That is well within the COSC standard .

[Rolex116520]

Originally Posted by NJSub

Yeah, within the COSC spec is a requirement. It's what we pay for. Nothing wrong with expecting it!

2X , given the price we pay for the things .

[padi56]

Originally Posted by diablojota

I'm going to up the ante here, any modern automatic movement from a reputable manufacturer (Rolex, PP, even ETA, etc.) should be able to be within COSC specs without question.

Would agree and with several experiments over the years with the help of my watchmaker friend and his timing machine.With a bit of careful regulation most movements today could pass the now a quite antiquated COSC test.Best results were on a Alpha $60 manual wind chronograph with the Seagull ST-19 chronograph Chinese made movement.The ST-19 is a 19-25 jewel column-wheel chronograph,depending on complications.And allegedly identical to the Venus 175 movement and made on the same machinery, which the Chinese acquired when the Venus 175 went out of production many many years ago. Others claim that the Seagull was simply reverse-engineered from the Venus and the argument continues over which story is correct: either way, the fact remains that the design retains all the very accurate and longlasting properties to the old Swiss Venus movement.This movement has been running now for well over two years well inside the COSC spec.But has been re-regulated twice over said period,and remains a very consistant and accurate watch.Rolex are built to be chronmeters, but others with careful regulation will often performto to COSC spec,but will need regular re-regulation keep them in spec.

[GMTJOHNNY]

Worth every penny for a watch that runs at virtually 99.9997% accurate over the course of a year.

[The GMT Kid]

My GMT II just came back from Dallas RSC and it is off by less than a second a day.

My TT DJ (vintage 1985) purchased on eBay is off by less than two seconds a day.

My YG DD purchased on eBay is off by less than two seconds a day when worn regularly (it's vintage 1965 so I cut it some slack).

This is every Rolex I own and they are all very accurate. Who knows when the eBay watches were last serviced.

I have come to expect a lot from my Rolex watches. And they deliver.

[allanofcalifornia]

If the watch is 14 years old and has never been serviced, then I would definitely get the watch serviced.


Allan