TUDOR · Monarch and TUDOR Royal
TUDOR M2639W1A0U-0001 vs TUDOR M2840D1A0-0001
11 published specifications differ between these two, and 3 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | TUDOR Monarch, 39mm dark champagne dialM2639W1A0U-0001 | |
|---|---|---|
| Case | 39mm stainless steel faceted case with polished and satin finishes | 40mm stainless steel case with polished and satin finish |
| Diameter | 39 mm | 40 mm |
| Bezel | Stainless steel bezel with polished and satin finishes | Stainless steel bezel |
| Dial | Dark champagne-colour, with applied hour markers | Black dial with applied stick hour markers, date at 3 o'clock, day at 12 o'clock |
| Crown | Stainless steel screw-down winding crown | Stainless steel screw-down winding crown with the TUDOR logo in relief |
| Bracelet | 2-link faceted bracelet | 5-link integrated bracelet in stainless steel, satin-brushed external and central links, polished intermediate links |
| Clasp | TUDOR "T-fit" clasp | TUDOR T-fit folding clasp with safety catch |
| Calibre | Manufacture Calibre MT5662-2U | Manufacture Calibre MT5633 |
| Power reserve | 65-hour power reserve | Approximately 70 hours |
| Certification | COSC and METAS certified | COSC, tuned to −2/+4 seconds |
| Movement notes | TUDOR describes high grade and exceptional finishes including Côtes de Genève, perlage, and an 18ct gold inlay on the rotor. | TUDOR states a five-year transferable guarantee with no registration or periodic maintenance checks required. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Water resistance
- Waterproof to 100m (330 ft)
- Crystal
- Sapphire crystal
- Movement
- Self-winding mechanical movement with bidirectional rotor system
Stated for one, not the other
These rows cannot be compared, because one maker publishes the figure and the other does not. An empty cell is a gap in the manufacturer's documentation, not a gap in the watch — and not a licence to fill it in from the other column.
| Thickness | 11.9 mm | not stated |
|---|---|---|
| Lug width | 20 mm | not stated |
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
Different movements to verify and to service
The M2639W1A0U-0001 runs the Manufacture Calibre MT5662-2U and the M2840D1A0-0001 the Manufacture Calibre MT5633. Two consequences at intake: the service history that is normal for one calibre is not evidence about the other, and the calibre is the check that catches a movement swapped into the wrong case. Confirm the movement matches the reference rather than assuming it from the dial.
What to check on each
M2639W1A0U-0001
- 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.
M2840D1A0-0001
- Treat the bracelet as part of the case. It is specified as integrated, so a damaged or missing bracelet is not solved by fitting a strap and a replacement is model-specific.
- Quote the published tolerance of minus two to plus four seconds a day. TUDOR states a tuned figure here beyond COSC certification, which is a stronger claim than most sheets offer.
- Set the day and the date separately across midnight and confirm both index cleanly. The day wheel is the component most often damaged by careless setting.
Sources
- TUDOR official product page for reference M2639W1A0U-0001 (Monarch; 39mm steel case; dark champagne-colour dial) - Case: 39mm stainless steel faceted case with polished and satin finishes; Lugs: 20mm lug width; Case thickness: 11.9mm; Waterproofness: waterproof to 100m (330 ft); Bezel: stainless steel bezel with polished and satin finishes; Dial: dark champagne-color with applied hour markers; Crystal: sapphire crystal; Movement: Manufacture Calibre MT5662-2U (COSC and METAS certified); self-winding mechanical movement with bidirectional rotor system; high grade and exceptional finishes including Cotes de Geneve; perlage and 18ct gold inlay on rotor; Power Reserve: 65-hour power reserve; Winding Crown: stainless steel screw-down winding crown; Bracelet: 2-link faceted bracelet with TUDOR T-fit clasp — retrieved 2026-09-22
- TUDOR official product page for reference M2840D1A0-0001 (TUDOR Royal 40; steel; integrated bracelet; day and date) - Case: 40mm stainless steel case with polished and satin finish; Waterproofness: Waterproof to 100m (330 ft); Bezel: Stainless steel bezel; Dial: Black dial, applied stick hour markers; date at 3 o'clock; day at 12 o'clock; Crystal: Sapphire crystal; Movement: Manufacture Calibre MT5633 (COSC), tuned to -2/+4 seconds; self-winding mechanical movement with bidirectional rotor system; Power Reserve: Power reserve of approximately 70 hours; Winding Crown: Stainless steel screw-down winding crown with the TUDOR logo in relief; Bracelet: 5-link integrated bracelet in stainless steel, satin-brushed external and central links, polished intermediate links, with TUDOR T-fit folding clasp and safety catch; Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required — retrieved 2026-09-23
Not affiliated with TUDOR. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.