Your watches are more accurate time keepers than any mechanical watch will ever likely be.

But, wanting to continue to differentiate its chronometers from others, the brand set its sights on another goal: obtaining certificates avec mention (certificates of superior performance). Completed movements are still sent off for official COSC certification. save hide report.

This exclusive designation attests that it has successfully undergone a series of specific final controls by Rolex in its own laboratories according to its own criteria which exceeds watchmaking norms and standards, in addition to the official COSC certification of its movement. After this, the movement is cased and then tested using (according to brand literature) “unparalleled testing methodologies and new high-technology equipment to certify each of its watches … according to its own criteria which exceed watchmaking norms and standards”. Enjoy your Tudor. Our Master Chronometer watches are tested and certified twice. The folder name must have at least 2 and less than 50 characters. Pictured above is my GMT-Master II. Formulated in the late 1950s, this inscription symbolizes the brand's tireless pursuit of chronometric excellence, given the pioneering role it played in developing wristwatch precision from early in the 20th century. /sThis is, of course, a trivial issue unnecessarily raised, but there you go.Silly, no?

Rolex "Oyster Perpetual Day-Date Superlative Chronometer officially certified", Werk Nr. In fact, in late 2015, the brand quietly updated their Superlative Chronometer Standards to make them even more stringent.Calibre 3255, one of Rolex’s latest (and greatest) movementsDesign purists might bemoan the resulting text-heavy dials that declare an Oyster to be ‘Superlative Chronometer Officially Certified’, but Rolex’s nigh-unimpeachable reputation for quality and accuracy has a lot invested in these words.© COPYRIGHT 2019 TIME+TIDE However, if you were inclined to be critical (and you know when it comes to Rolex there will always be folk who like to be negative), you might have noticed that aside from the COSC testing, all the other testing and tweaking is internal, and not validated by an external authority, unlike Omega’s METAS-certified testing. According to COSC, a chronometer is a high precision watch capable of displaying the seconds and housing a movement that has been tested over several days, in different positions, and at … To mark this difference, in the late 1930s, the brand changed the inscription on its dials from “Chronometer” to “Officially Certified Chronometer”. Perhaps a bit too flash for me also.Branding is, of course, an exercise in cultivating feeling. It's done so by pushing heritage, exclusivity, materials, design and qualities other than actual timekeeping.Bulky case badly proportioned. That's a fine watch too.When brand marketing is done well it can be brilliantly seductive. In the pursuit of precision, Rolex tests the accuracy of each watch after casing the movement over a 24-hour cycle, in seven static positions as well as in a rotating rack.

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