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wdrazek · 10 July 2008, 06:15 AM

For the past few months I've been searching for the "perfect" watch, or at least the perfect one for me. Being used to quartz (I own a Cartier and a Tag), I love the accuracy of quartz but am being drawn more to automatics.

I know the COSC standard is +6/ -4 secs per day, but in practice what accuracy can I expect from a properly adjusted Seamaster? My hope is that I could get within a minute or so per month or 2 secs/ day.

I am interested in both the SMP line and the co-axial. Thanks for your replies.

Cmaster03 · 10 July 2008, 06:23 AM

My SMP was a second a day watch for several years. Last year it was about two seconds a day when I checked it. This was after wearing it every day for four years. They seem to run very well and Omega did a good job on regulating the 2892s in them.

The Co-Ax would probably run as good or even better, but I have no experience with them.

A buddy just bought an SMP like mine, an older "Bond" 2531.80 and it is also running a second off a day. Not sure how old his SMP is but it is running great. Another friend has the black pre-Co Ax Seamaster, forget the Reference number. If I recall, he said it averaged about two seconds a day variation.

Tools · 10 July 2008, 06:24 AM

There is no reason today why a high quality, fast beat movement, automtic watch cannot be regulated to within 2 or 3 seconds accuracy within 24 hrs.

My personal SMP with the excellent fast beat 28,800bph ca.1120 movement runs consistently at ~1.5 seconds fast.

The co-axial movements have been "de-tuned to run at 21,600bph, presumably to enable the de-coupled escapement to function, and advertise that they are more "consistent" than the non-coaxial. Consistent simply means that the variance each day will not be as great, but they are not likely to be any more accurate... They should also be easily regulated to stay within 2 or 3 seconds daily..

C.J. · 10 July 2008, 06:30 AM

I've had several SMP's, both Co-Axial and non. Every one has been incredibly accurate and well within the parameters you're looking for

haakon59 · 10 July 2008, 09:48 AM

Given that your main criteria is accuracy, I personally would go for the Omega's with the co-axial movement because they are designed to last longer between visits to the watchmaker for tuning. That being said, although Omega is pretty good as a brand on accuracy, at the same time you have to take account of the fact that you are talking about a mechanical movement and they tend not to be quite as precise as quartz. While I have several automatics which are 1-2 seconds off per day, I also have one which is off by more than 30 seconds/day (not an Omega, but still has an ETA 2892-A2 movement). Sure, you can get Omegas adjusted and they can most of the time be calibrated to work within your parameters.

gasguy98 · 10 July 2008, 09:51 AM

When I got my Seamaster in '02 it was +6/day for the first few weeks, then settled down to +3/day for 6 years. It is now about -5/day, so I sent it in for service.

WJGESQ · 10 July 2008, 10:23 AM

My 300 Chrono Diver, 2225.80, has been dead one with no noticable lost or gain after 1.5 months.

RW16610 · 10 July 2008, 11:15 AM

Quote:

Originally Posted by Tools

There is no reason today why a high quality, fast beat movement, automtic watch cannot be regulated to within 2 or 3 seconds accuracy within 24 hrs.

My personal SMP with the excellent fast beat 28,800bph ca.1120 movement runs consistently at ~1.5 seconds fast.

The co-axial movements have been "de-tuned to run at 21,600bph, presumably to enable the de-coupled escapement to function, and advertise that they are more "consistent" than the non-coaxial. Consistent simply means that the variance each day will not be as great, but they are not likely to be any more accurate... They should also be easily regulated to stay within 2 or 3 seconds daily..

Yes completly agree with Tools. Last time I checked my SMP co-axial was +1.4 seconds per day, was very happy with that.

Perdu · 11 July 2008, 08:52 AM

My SmP looses about 1/2 second a day.

wdrazek · 13 July 2008, 06:58 AM

This is really amazing. In stores and on other forums I've been led to believe that COSC was the best I could hope to achieve, except on the Rolex forums. Now I find Omega is in the same league.

I am impressed. Thanks to all.

10 July 2008, 06:15 AM	#1
wdrazek "TRF" Member Join Date: Jul 2008 Location: NYS Watch: 126300 Posts: 50	Seamaster accuracy For the past few months I've been searching for the "perfect" watch, or at least the perfect one for me. Being used to quartz (I own a Cartier and a Tag), I love the accuracy of quartz but am being drawn more to automatics. I know the COSC standard is +6/ -4 secs per day, but in practice what accuracy can I expect from a properly adjusted Seamaster? My hope is that I could get within a minute or so per month or 2 secs/ day. I am interested in both the SMP line and the co-axial. Thanks for your replies.

10 July 2008, 06:24 AM	#3
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,492	There is no reason today why a high quality, fast beat movement, automtic watch cannot be regulated to within 2 or 3 seconds accuracy within 24 hrs. My personal SMP with the excellent fast beat 28,800bph ca.1120 movement runs consistently at ~1.5 seconds fast. The co-axial movements have been "de-tuned to run at 21,600bph, presumably to enable the de-coupled escapement to function, and advertise that they are more "consistent" than the non-coaxial. Consistent simply means that the variance each day will not be as great, but they are not likely to be any more accurate... They should also be easily regulated to stay within 2 or 3 seconds daily.. __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

11 July 2008, 08:52 AM	#9
Perdu "TRF" Member Join Date: Jul 2007 Real Name: Gary Location: GMT-6 Watch: GMT Posts: 3,350	My SmP looses about 1/2 second a day. __________________ Omega Seamaster 300M GMT Noire Omega Seamaster Aqua Terra 8500 Benson 1937 Sterling Silver Hunter

10 July 2008, 06:23 AM	#2
Cmaster03 Banned Join Date: May 2008 Location: USA Posts: 167	My SMP was a second a day watch for several years. Last year it was about two seconds a day when I checked it. This was after wearing it every day for four years. They seem to run very well and Omega did a good job on regulating the 2892s in them. The Co-Ax would probably run as good or even better, but I have no experience with them. A buddy just bought an SMP like mine, an older "Bond" 2531.80 and it is also running a second off a day. Not sure how old his SMP is but it is running great. Another friend has the black pre-Co Ax Seamaster, forget the Reference number. If I recall, he said it averaged about two seconds a day variation.

10 July 2008, 06:30 AM	#4
C.J. "TRF" Member Join Date: Jan 2006 Location: * Posts: 10,196	I've had several SMP's, both Co-Axial and non. Every one has been incredibly accurate and well within the parameters you're looking for

10 July 2008, 09:48 AM	#5
haakon59 "TRF" Member Join Date: Sep 2006 Location: Seattle Posts: 1,571	Given that your main criteria is accuracy, I personally would go for the Omega's with the co-axial movement because they are designed to last longer between visits to the watchmaker for tuning. That being said, although Omega is pretty good as a brand on accuracy, at the same time you have to take account of the fact that you are talking about a mechanical movement and they tend not to be quite as precise as quartz. While I have several automatics which are 1-2 seconds off per day, I also have one which is off by more than 30 seconds/day (not an Omega, but still has an ETA 2892-A2 movement). Sure, you can get Omegas adjusted and they can most of the time be calibrated to work within your parameters.

10 July 2008, 09:51 AM	#6
gasguy98 Member Join Date: Jun 2008 Location: Tamarac, FL Watch: Omega Seamaster Posts: 50	When I got my Seamaster in '02 it was +6/day for the first few weeks, then settled down to +3/day for 6 years. It is now about -5/day, so I sent it in for service.

10 July 2008, 10:23 AM	#7
WJGESQ Banned Join Date: Jan 2008 Location: Florida Posts: 3,753	My 300 Chrono Diver, 2225.80, has been dead one with no noticable lost or gain after 1.5 months.

13 July 2008, 06:58 AM	#10
wdrazek "TRF" Member Join Date: Jul 2008 Location: NYS Watch: 126300 Posts: 50	This is really amazing. In stores and on other forums I've been led to believe that COSC was the best I could hope to achieve, except on the Rolex forums. Now I find Omega is in the same league. I am impressed. Thanks to all.

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