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Every two years, watch aficionados have their sights set on the Only Watch charity auction. And not because they can buy the exclusive one-of-a-kind pieces that the brands sell, but because they often surprise us with great pieces that will never be released. Many of these watches are simply variations of existing models, but that doesn’t mean that some of them don’t deserve all our attention. A clear example of this is the Tudor Black Bay GMT One: it’s the same Black Bay GMT we all know, with the “only” difference being the aged finish of the case, bracelet, dial… and movement.

Tudor Black Bay GMT One - Only Watch 2021

If the watches with bronze case and its patina seem to have been rescued from a 19th century shipwreck, this aged steel Tudor could well have been unearthed next to a Templar sword. And if we take into account the precedents of previous Only Watch editions(2015, 2019) that derived in regular production reference, we could well see this kind of vintage finish in future models of the collection. According to the brand, the striking case and bracelet finish that is the result of “a secret stainless steel aging technique”.

Tudor Black Bay GMT One - Only Watch 2021

The GMT One has a steel case and bracelet identical to the standard model, except for the surface treatment and sapphire back. Both are coated with a black coating which is then partially worn off randomly by tumbling polishing. The rest of the watch has a similar treatment to give it a vintage look. The bezel ring is aged steel with an engraved scale, while the dial is matte black with a grainy-looking finish. For its part, the bridges, rotor and baseplate also exhibit the same aging.

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Tudor Black Bay GMT One - Only Watch 2021

On the dial we can read GMT Master Chronometer, which means that the standard MT5652 movement has been updated to be able to offer this certificate as defined by the Metas, one of the most demanding standards in the industry, with an accuracy of 5 seconds (0 +5) and a resistance to magnetic fields up to 15,000 Gauss, in addition to an excellent power reserve of 70 hours.

The estimated selling price at auction for this Tudor is between CHF 4,000 and CHF 8,000, although the final value is sure to multiply this figure.

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