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ronburgundy · 15 November 2013, 12:45 PM

Forgive me if this has been discussed, I am a new Rolex owner/forum member and was curious about the COSC certifications. Is this a marketing bit, or is this a legitimate, game changing certification? I can't find much information on what specific tests the watches go through and if most watches would pass this test or not. Any info would be much appreciated, thanks!

Frenchie · 15 November 2013, 01:02 PM

"I can't find much information..."?

Where did you look? The "COSC" article in Wikipedia, the obvious starting point, describes the tests in detail.

ronburgundy · 15 November 2013, 01:13 PM

Ah yes, Wiki does show the tests. I had been looking on the Rolex website and found a little info. My bad, Frenchie. However, I wouldn't mind hearing opinions about the COSC if anyone cares to share.

Old Expat Beast · 15 November 2013, 01:16 PM

Years ago, when Rolex started getting COSC certified, it was a very big deal, as watches were not that accurate in general. Nowadays, not so much, and it just clutters up the dial in the opinion of many.

Tools · 15 November 2013, 01:56 PM

By Swiss law, you cannot put the term "Chronometer" on a Swiss watch that is not COSC certified.. Since Rolex sells legitimate chronometers, they must subject those watches for testing..

Whether it is marketing or not is a good discussion. In any event it does give the buyer some confidence that the watch will perform to a certain standard and be consistent..

Other watches may indeed pass the COSC tests, but since they don't test them, you will never know..

15 November 2013, 12:45 PM	#1
ronburgundy "TRF" Member Join Date: Nov 2013 Real Name: Rob Location: Texas Watch: BLNR Posts: 364	COSC Certification Question Forgive me if this has been discussed, I am a new Rolex owner/forum member and was curious about the COSC certifications. Is this a marketing bit, or is this a legitimate, game changing certification? I can't find much information on what specific tests the watches go through and if most watches would pass this test or not. Any info would be much appreciated, thanks!

15 November 2013, 01:16 PM	#4
Old Expat Beast TRF Moderator & 2024 SubLV41 Patron Join Date: Jul 2013 Real Name: Adam Location: Far East Watch: Golden Tuna Posts: 28,826	Years ago, when Rolex started getting COSC certified, it was a very big deal, as watches were not that accurate in general. Nowadays, not so much, and it just clutters up the dial in the opinion of many. __________________ _______________________

15 November 2013, 01:56 PM	#5
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,515	By Swiss law, you cannot put the term "Chronometer" on a Swiss watch that is not COSC certified.. Since Rolex sells legitimate chronometers, they must subject those watches for testing.. Whether it is marketing or not is a good discussion. In any event it does give the buyer some confidence that the watch will perform to a certain standard and be consistent.. Other watches may indeed pass the COSC tests, but since they don't test them, you will never know.. __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

15 November 2013, 01:02 PM	#2
Frenchie Member Join Date: May 2013 Location: Bowling Green, OH Watch: SubC Posts: 8	"I can't find much information..."? Where did you look? The "COSC" article in Wikipedia, the obvious starting point, describes the tests in detail.

15 November 2013, 01:13 PM	#3
ronburgundy "TRF" Member Join Date: Nov 2013 Real Name: Rob Location: Texas Watch: BLNR Posts: 364	Ah yes, Wiki does show the tests. I had been looking on the Rolex website and found a little info. My bad, Frenchie. However, I wouldn't mind hearing opinions about the COSC if anyone cares to share.

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