Master co-axial question on accuracy.

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Mine is 1 second a day slow over six months.
 
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Mine is pretty much dead on balls accurate.

It's an industry term.
 
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These Omega co-axials are incredible!! Mine is 12 months old and keeps time within 1 to 2 seconds per day.
 
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So does my 25-year old Speedmaster Apollo XI. Not much inducement for me to buy a co-axial. I only re-set this one when I forget to wind it.
 
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As a recent first time owner of an Omega Aqua Terra 150 Master Co Axial, I had noticed over the last few weeks that my watch gains about 6 or seconds every day. At first I was prepared to go charging back to the shop I bought it from demanding something is done about it. However having read this article my mind has been put at rest that this would appear to be standard for an automatic watch.......Pheww!!!

Hi. I think you should go back to Omega. All Master Co-axials are METAS certified as well as being certified to Omega's in house chronometer measurement which has a tolerance of -1 to +5. Yours is outside that range and you are therefore within your right to ask Omega to regulate it within those specs. Hope this helps.
 
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Hi. I think you should go back to Omega. All Master Co-axials are METAS certified as well as being certified to Omega's in house chronometer measurement which has a tolerance of -1 to +5. Yours is outside that range and you are therefore within your right to ask Omega to regulate it within those specs. Hope this helps.

All master co-axial watches are not METAS certified - only Master Chronometer versions are, and the rest are COSC certified.

All Omega COSC watches have a tolerance for average daily rate of between -1 and +6 seconds per day.

METAS certified have a tolerance for average daily rate of between 0 and +5 seconds per day.

Cheers, Al
 
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I was confused by the names at first.
A "Master Co-Axial Chronometer" is COSC certified, for example the Seamaster 300 Master Co-Axial.
A "Co-Axial Master Chronometer" is META certified, for example the Globemaster.
 
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My newly acquired omega speedmaster racing runs at + 1 second a day so far extremely pleased with it 6bcd5ab26631504af669207134bb77de.jpg

Sent from my SM-G925F using Tapatalk
 
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My 26-year old Rolex Date-Just gains consistently 1 second per day. I could improve on that, but when is good enough, good enough?
 
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FWIW; I just purchased a PO 215.30.44.21.01.001 and the nice chap at the boutique referred me to:

https://www.omegawatches.com

You can check the actual Omega test results for your specific watch at the above link and it will show you the tolerances for your individual watch for each of the Master Chronometer certification tests that Omega performs.

I set mine using a NTP time from the WatchCheck app on December 1st. After 6 days (wearing it maybe 6 hours a day), the time is still correct to the second!

5YjOYg0.jpg
Edited:
 
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Not a master...but it still maintains +/- 1/s per day over the past two weeks. However, it had suddenly gained a minute or more in the first week I got it with me. So the movement might need sometime to settle down.

I use www.time.is


20161206_009c48cca378452b74c8OlNnHDP8WbEr.jpg
 
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All Omega COSC watches have a tolerance for average daily rate of between -1 and +6 seconds per day.

Really, is that a new statistic, thought it was -4 and +6 for Omega
My 2500 and 8500 are both -3 or -2 every day.
 
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Really, is that a new statistic, thought it was -4 and +6 for Omega
My 2500 and 8500 are both -3 or -2 every day.

Not a new thing...have been that way for years...
 
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Not a new thing...have been that way for years...

So both mine are out of COSC in other words?
 
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So both mine are out of COSC in other words?

COSC = -4 to +6

Omega tolerances for COSC watches are tighter, so -1 to +6