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Annan · 31 January 2013, 11:14 AM

TRF has had numerous threads regarding questions on the accuracy of our beloved Rolexes and with most responses including a reference to the COSC standard of -4/+6. I stumbled upon this short article that helped to enlighten me a little about the COSC. Thought some of you might find this of interest too.

kilyung · 31 January 2013, 11:15 AM

What article?

Annan · 31 January 2013, 11:16 AM

Sorry....got so excited I forgot to include the link: http://hiro.alliancehorlogere.com/en...onom%C3%A8tres

77T · 31 January 2013, 11:17 AM

Cant think of a better one than this...

One and the same...

http://en.wikipedia.org/wiki/COSC

padi56 · 31 January 2013, 08:03 PM

Quote:

Originally Posted by Annan

TRF has had numerous threads regarding questions on the accuracy of our beloved Rolexes and with most responses including a reference to the COSC standard of -4/+6. I stumbled upon this short article that helped to enlighten me a little about the COSC. Thought some of you might find this of interest too.

The main problem with todays COSC test is they only test the bare uncased movement no dial hands or even winding rotor are present at testing.Special dial hands and because of the vast amount of movements tested by Rolex they have there own machine there.The bare movements are wound up by a machine and tested by time laspe computer linked photography.And the certifaction is only at the time of testing,and today most movements with careful regulation could pass todays COSC test today IMHO its more marketing than anything.

Annan · 31 January 2013, 11:56 PM

I completely agree, Padi.

kilyung · 1 February 2013, 12:00 AM

Isn't there a more rigorous certification than COSC?

padi56 · 1 February 2013, 12:11 AM

Quote:

Originally Posted by kilyung

Isn't there a more rigorous certification than COSC?

Not for Swiss movements of the Rolex size now before the COSC was founded there were Swiss tests to a slightly higher standard.I think the European DIN Standard and the Japanese standard for mechanical chronometers is to a slightly higher standard than the Swiss.But both test there watches in the case that will be after testing be the same for retail sale.

Annan · 1 February 2013, 12:25 AM

Here's a link to the COSC for what it's worth......doesn't reveal much more info IMO. http://www.cosc.ch/

31 January 2013, 11:14 AM	#1
Annan "TRF" Member Join Date: Jun 2011 Real Name: Ron Location: Arizona, USA Watch: 116233 Posts: 3,180	COSC Standards TRF has had numerous threads regarding questions on the accuracy of our beloved Rolexes and with most responses including a reference to the COSC standard of -4/+6. I stumbled upon this short article that helped to enlighten me a little about the COSC. Thought some of you might find this of interest too. __________________ *so many Rolexes.....so little time*

31 January 2013, 11:16 AM	#3
Annan "TRF" Member Join Date: Jun 2011 Real Name: Ron Location: Arizona, USA Watch: 116233 Posts: 3,180	Sorry....got so excited I forgot to include the link: http://hiro.alliancehorlogere.com/en...onom%C3%A8tres __________________ *so many Rolexes.....so little time*

31 January 2013, 11:17 AM	#4
77T 2024 SubLV41 Pledge Member Join Date: Dec 2010 Real Name: PaulG Location: Georgia Posts: 41,904	Cant think of a better one than this... One and the same... http://en.wikipedia.org/wiki/COSC __________________ Does anyone really know what time it is?

31 January 2013, 11:56 PM	#6
Annan "TRF" Member Join Date: Jun 2011 Real Name: Ron Location: Arizona, USA Watch: 116233 Posts: 3,180	I completely agree, Padi. __________________ *so many Rolexes.....so little time*

1 February 2013, 12:25 AM	#9
Annan "TRF" Member Join Date: Jun 2011 Real Name: Ron Location: Arizona, USA Watch: 116233 Posts: 3,180	Here's a link to the COSC for what it's worth......doesn't reveal much more info IMO. http://www.cosc.ch/ __________________ *so many Rolexes.....so little time*

31 January 2013, 11:15 AM	#2
kilyung 2024 SubLV41 Pledge Member Join Date: Jul 2009 Location: Cave Watch: Sundial Posts: 33,940	What article?

1 February 2013, 12:00 AM	#7
kilyung 2024 SubLV41 Pledge Member Join Date: Jul 2009 Location: Cave Watch: Sundial Posts: 33,940	Isn't there a more rigorous certification than COSC?

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