TUDOR · Monarch
TUDOR Monarch M2639W1A0U-0001: specifications and what to check
A faceted case and matching faceted bracelet, with a movement TUDOR finishes to a higher grade than the rest of its range. Facets are the inspection story: they cannot be polished out.
Reference M2639W1A0U-0001 · specifications read from the manufacturer on 2026-09-22 · listed as current
Specifications
As published by TUDOR. A field the manufacturer does not state is left out rather than filled in.
- Case
- 39mm stainless steel faceted case with polished and satin finishes
- Diameter
- 39 mm
- Thickness
- 11.9 mm
- Lug width
- 20 mm
- Water resistance
- Waterproof to 100m (330 ft)
- Crystal
- Sapphire crystal
- Bezel
- Stainless steel bezel with polished and satin finishes
- Dial
- Dark champagne-colour, with applied hour markers
- Crown
- Stainless steel screw-down winding crown
- Bracelet
- 2-link faceted bracelet
- Clasp
- TUDOR "T-fit" clasp
Movement
- Calibre
- Manufacture Calibre MT5662-2U
- Type
- Self-winding mechanical movement with bidirectional rotor system
- Power reserve
- 65-hour power reserve
- Certification
- COSC and METAS certified
- Notes
- TUDOR describes high grade and exceptional finishes including Côtes de Genève, perlage, and an 18ct gold inlay on the rotor.
What to check before you buy
- Study the facet edges on the case and bracelet under raking light. Crisp arrises are the entire design, and a single careless polish rounds them permanently.
- Check the facets line up where the bracelet meets the case. Misalignment is the most visible fault on a faceted design and the hardest to argue is original.
- Judge the dial colour in daylight rather than under warm shop lighting. A dark champagne surface reads very differently by light source, and a buyer's disappointment on arrival is avoidable.
- Look at the rotor through any service documentation available. TUDOR specifies an 18ct gold inlay, and its presence is a straightforward check that the movement is the one the reference calls for.
- Confirm the screw-down crown seats fully. The case is rated to 100 metres and the crown is the seal, so cross-threading matters as much here as on a diver.
Facets do not survive carelessness
The case and bracelet are both faceted, with alternating polished and satin surfaces meeting at defined edges. That geometry is the product. It is also uniquely vulnerable, because every one of those edges is a line that a polishing wheel will soften and never restore.
This is the single most important thing to assess on a used example. Hold it under a raking light and look along the edges rather than at the faces. Sharp, consistent arrises mean an untouched case. Soft, rounded ones mean somebody has refinished it, and no amount of subsequent work brings the definition back.
Price accordingly, and describe accordingly — a rounded facet is obvious to anyone who handles these regularly.
Alignment is the second check
Faceted bracelets meet faceted cases at a junction where any discrepancy shows. Look straight down at the point where the end link meets the case flank. On a correct example the surfaces continue; on a mismatched or badly refitted one they step.
A conventional brushed bracelet forgives this. This design does not.
A movement finished above the range
TUDOR specifies the MT5662-2U with high grade finishing — Côtes de Genève, perlage, and an 18ct gold inlay on the rotor — which is a deliberate step above the plainer manufacture calibres elsewhere in its catalogue.
That has a practical use beyond appearance. The gold rotor inlay is a concrete, checkable feature: if service paperwork or photographs of the movement show something plain, the movement is not what this reference is specified with. It is a rare case where decoration doubles as identification.
Dress proportions, sports sealing
At 39mm across and 11.9mm deep, with 100 metres of water resistance, this sits between categories. It wears as a dress watch and is sealed like a daily one — which is a genuine selling point, provided you do not let a listing inflate it into something rated for swimming under pressure.
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Sources
Not affiliated with TUDOR. Specifications are read from the manufacturer's own published documentation on the date shown and may change; the manufacturer's current documentation governs.