Tudor Royal 40 mm M2840D1A0-0001

Imagen: Tudor, web oficial

The storyWhy this reference matters

Royal is not a word Tudor invented in 2020. In the fifties the brand split its Oyster line with two surnames: Prince meant automatic — the rotor Wilsdorf had introduced at Rolex — and Royal was printed on the dials of the hand-wound models sold as the range option. A 1955 Oyster Royal and this 2026 one share nothing whatsoever except the name, which is precisely what is funny about it.

The modern Royal appeared in 2020 as Tudor's affordable shot at the integrated-bracelet, fluted-bezel watch: four sizes — 28, 34, 38 and 41 mm — with uncertified calibres bought from ETA or Sellita. It sold well and still spent five years as the model nobody discussed on the forums, the one that turned up in lists of "Tudors that exist" without further comment. At Watches and Wonders 2026, the brand rebuilt it from scratch.

The overhaul moved the sizes to 30, 36 and 40 mm and, more to the point, fitted in-house calibres for the first time: MT5201 in the small one, MT5412 in the middle and MT5633 in the 40, all three COSC certified. Along the way the bezel flutes were sharpened and mirror-polished, the end links redesigned so they stopped rubbing the case, the drilled lug holes removed, and a T-fit clasp with micro-adjustment fitted.

SpecificationsThe numbers, in one table

IdentificationHow to tell it apart

The reference states the size out loud. In the new generation, the digits after M28 are the millimetres: M2840 is the 40, M2836 the 36 and M2830 the 30. The earlier Royals used a different logic — M28600, M28500, M28400 and M28300 for 41, 38, 34 and 28 mm — so a five-digit block followed by the hyphen is always the old generation.

Within the steel M2840D1A0 block, the suffix is the dial colour: -0001 black, -0002 blue, -0003 green, -0004 silver. If the reference ends A3 rather than A0 — M2840D1A3 — it is the steel-and-yellow-gold version. The 40 mm is also the only one in the family with a day aperture at twelve, so a dial with two windows can only be this size.

To separate the generations without reading the reference: the old Royals have drilled lug holes and the new ones do not; the bezel flutes went from rounded to sharp and mirror-polished; and the new clasp carries the T-fit system, recognisable by the sliding carriage inside the clasp itself. If a seller says "COSC certified chronometer", it can only be a Royal from 2026 onwards.

CollectingWhat collectors check

The trap here is easy to see and easy to walk into: a previous-generation Royal is still a good watch, but it carries a supplied, uncertified movement and it is advertised under exactly the same name. Check the size before anything else. Forty-one, thirty-eight, thirty-four or twenty-eight millimetres means the 2020 generation; thirty, thirty-six or forty means an in-house MT calibre and COSC certification.

On an integrated-bracelet watch, the bracelet is the case. Look at how the end links sit against the flank: visible play or a rub mark means somebody has forced the fit. Check the T-fit carriage slides and locks without slack, and that the whole thing does not rattle when you swing it. A worn integrated bracelet cannot be swapped for a generic one — you either pay for the original or you live with it.

A mirror-polished fluted bezel is the first casualty of a workshop polish: the flutes round off, lose their edge, and there is no going back. Look at those before you look at the case, with the light coming from the side. And check that the day and date change at midnight; if they flip at noon the watch is simply set twelve hours out rather than broken, but it is worth knowing before you raise it with the seller.

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