TUDOR · Monarch and Clair de Rose
TUDOR M2639W1A0U-0001 vs TUDOR M35800-0001
12 published specifications differ between these two, and 1 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 | 34mm steel case with polished finish |
| Diameter | 39 mm | 34 mm |
| Crystal | Sapphire crystal | Domed sapphire crystal |
| Bezel | Stainless steel bezel with polished and satin finishes | Smooth steel bezel with polished finish |
| Dial | Dark champagne-colour, with applied hour markers | Opaline |
| Crown | Stainless steel screw-down winding crown | Steel screw-down winding crown with a transparent blue spinel cabochon |
| Bracelet | 2-link faceted bracelet | Steel bracelet with steel attachments |
| Clasp | TUDOR "T-fit" clasp | Folding clasp with safety catch |
| Calibre | Manufacture Calibre MT5662-2U | Calibre T601 |
| Movement | Self-winding mechanical movement with bidirectional rotor system | Self-winding mechanical movement |
| Power reserve | 65-hour power reserve | Approximately 38 hours |
| Movement notes | TUDOR describes high grade and exceptional finishes including Côtes de Genève, perlage, and an 18ct gold inlay on the rotor. | TUDOR does not describe this calibre as a Manufacture movement and lists no chronometer certification for this reference. A five-year transferable guarantee is stated, 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)
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 |
| Certification | COSC and METAS certified | 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.
These reach different buyers
39 mm on the M2639W1A0U-0001 against 34 mm on the M35800-0001. Diameter is a poor predictor of how a watch actually sits, but it is the field buyers filter on, so the two land in front of different people. Do not let one listing's photographs or copy stand in for the other.
One survives the weekend and one does not
65 hours on the M2639W1A0U-0001 against 38 on the M35800-0001. Below about sixty hours a watch left off the wrist from Friday is stopped by Monday. Wind both fully at intake and confirm they reach the stated figure — a short reserve leaves a tired barrel nowhere to hide, and it is the kind of fault a buyer reports in week two.
Different movements to verify and to service
The M2639W1A0U-0001 runs the Manufacture Calibre MT5662-2U and the M35800-0001 the Calibre T601. 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.
M35800-0001
- Quote the calibre as T601 and the reserve as approximately 38 hours. TUDOR does not call this a Manufacture movement and lists no COSC certification, unlike most of the references documented here.
- Expect it to stop after a day and a half off the wrist, and tell the buyer so, because thirty-eight hours is far short of the seventy most of the range carries.
- Inspect the blue spinel cabochon in the crown for chips and confirm it is seated. It is a set stone in a working, screw-down component.
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 M35800-0001 (Clair de Rose 34; steel; calibre T601) - Case: 34mm steel case with polished finish; Waterproofness: Waterproof to 100m (330 ft); Bezel: Smooth steel bezel with polished finish; Dial: Opaline; Crystal: Domed sapphire crystal; Movement: Self-winding mechanical movement, Calibre T601; Power Reserve: Power reserve of approximately 38 hours; Winding Crown: Steel screw-down winding crown, with transparent blue spinel cabochon; Bracelet: Steel bracelet with folding clasp and safety catch; steel attachments; 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.