It was less than a year ago, at last year’s BaselWorld event in March, 2015 that Rolex introduced the updated Rolex Day-Date 40 – and with it, the new Rolex Superlative Chronometer Certification. While it was no news that Rolex submitted its watches to stringent in-house tests, the Day-Date 40 marked the start of a new in-house certification process, as Rolex said it would test the new Day-Date watches and their 3255 movements to an unprecedented and indeed very impressive accuracy rating of just -2/+2 seconds per day. Now, Rolex has quietly extended its Rolex Superlative Chronometer Certification to its entire production, meaning that all Rolex Oyster and Cellini watches will be tested by Rolex to meet its stringent -2/+2 seconds accuracy ratings. Here’s how it all works.
For ages (some more about history further below), Rolex has been submitting its movements to the independent COSC chronometer certification tests – and that will not change, as Rolex cellini series fake watches will continue to send all its movements to COSC. This means that the uncased movements are sent over to COSC’s facilities in Biel and Saint-Imier, where each uncased movement is individually tested for a total of fifteen days, in five different positions, at three different temperatures. During these tests, the watches are checked to run within a maximum average deviation of -4/+6 seconds per day. The movements that pass the test will get their COSC Officially Certified Chronometer marking and then are transferred back to Rolex.
Until recently, Rolex leather strap replica watch has been casing up these COSC certified movements and been submitting them for internal certification, complementing that of COSC. For Rolex it was this additional testing that conferred the title of Superlative Chronometer on Rolex watches – thus far authenticated by the red Rolex seal that came attached to Rolex timepieces.
What is news, though, is how this in-house testing is conveyed and how strict its criteria have become. In practice, Rolex has developed and re-designed its own state-of-the-art testing facilities and its proprietary methodology that is built around testing fully cased up watches – part of this methodology includes the simulation of the conditions in which a watch is actually worn – hence, Rolex say, imitating circumstances that are much more like the “real-life experience” of the watch.