OMEGA · Constellation and De Ville Prestige
OMEGA 131.30.41.21.04.001 vs OMEGA 434.10.40.20.10.001
11 published specifications differ between these two, and 2 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA Constellation Co-Axial Master Chronometer 41mm, white dial131.30.41.21.04.001 | OMEGA De Ville Prestige Co-Axial Master Chronometer 40mm, green dial434.10.40.20.10.001 |
|---|---|---|
| Case | Steel, 41 mm | Steel, 40 mm |
| Diameter | 41 mm | 40 mm |
| Thickness | 13.5 mm | 9.93 mm |
| Lug to lug | 44 mm | 46.26 mm |
| Water resistance | 5 bar (50 metres / 165 feet) | 3 bar (30 metres / 100 feet) |
| Crystal | Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides | Domed, scratch-resistant sapphire crystal with anti-reflective treatment inside |
| Dial | White | Green |
| Clasp | Foldover butterfly clasp with comfort setting | Butterfly clasp |
| Calibre | Omega 8900 | Omega 8800 |
| Power reserve | 60 hours | 55 hours |
| Movement notes | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 171 g. No distance between the lugs is published on this product page. | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 114 g. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Bracelet
- Steel
- Movement
- Self winding
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.
| Lug width | not stated | 19 mm |
|---|
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.
One of these is the harder fit
Lug to lug is 46.3 mm on the 434.10.40.20.10.001 against 44 mm on the 131.30.41.21.04.001 — a 2.3 mm difference across the wrist. Diameter is what buyers ask about; lug to lug is what decides whether a case sits flat or overhangs. Ask for a wrist measurement before shipping the 434.10.40.20.10.001, and put the figure in the listing rather than the diameter alone.
A visible difference in how they wear
3.6 mm of thickness separates these, with the 131.30.41.21.04.001 the taller at 13.5 mm. That is the difference between a watch that goes under a cuff and one that catches on it — worth a photograph from the side rather than a number in a table.
Do not describe these the same way
The 434.10.40.20.10.001 is rated to 30 metres and the 131.30.41.21.04.001 to 50. A rating is a factory figure for a new watch with fresh gaskets, not a promise about a used one — but the gap still matters in writing. Describe the 434.10.40.20.10.001 in words a buyer can act on, and do not let a template carry the 131.30.41.21.04.001's language onto it.
Different movements to verify and to service
The 131.30.41.21.04.001 runs the Omega 8900 and the 434.10.40.20.10.001 the Omega 8800. 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
131.30.41.21.04.001
- Lead with the 44 mm lug to lug. On a 41 mm case that is an overhang of three millimetres in total, which makes this wear far smaller than its diameter implies.
- Measure the lug width yourself if a buyer asks. OMEGA publishes no between-lugs figure for this reference, and the integrated case makes it a question worth answering precisely.
- Check the white dial under several light sources before describing its colour, since white photographs warm or cool depending entirely on the lighting.
434.10.40.20.10.001
- Tell the buyer the rating is 3 bar. Thirty metres is the lowest figure of any OMEGA documented here and it covers rain and hand washing only.
- Note that the calibre 8800 here is the same movement OMEGA fits to a 300-metre dive watch, which is a good illustration that the depth rating is a property of the case.
- Inspect the crystal's inner coating by looking through the glass at a shallow angle. OMEGA treats this one inside only, so haze behind the sapphire means a replacement.
Sources
- OMEGA official product page for reference 131.30.41.21.04.001 (Constellation Co-Axial Master Chronometer 41 mm, steel) - Lug-to-lug: 44.00 mm; Thickness: 13.50 mm; Case diameter: 41 mm; Case: Steel; Dial color: White; Crystal: Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 5 bar (50 metres / 165 feet); Total product weight (approx.): 171 g; Caliber: Omega 8900; Movement type: Self winding; Power reserve: 60 hours; Bracelet material: Steel; Type of Clasp: Foldover butterfly clasp with comfort setting; Between lugs: not published on this page — retrieved 2026-09-23
- OMEGA official product page for reference 434.10.40.20.10.001 (De Ville Prestige Co-Axial Master Chronometer 40 mm, steel) - Between lugs: 19 mm; Lug-to-lug: 46.26 mm; Thickness: 9.93 mm; Case diameter: 40 mm; Case: Steel; Dial color: Green; Crystal: Domed, scratch-resistant sapphire crystal with anti-reflective treatment inside; Water resistance: 3 bar (30 metres / 100 feet); Total product weight (approx.): 114 g; Caliber: Omega 8800; Movement type: Self winding; Power reserve: 55 hours; Bracelet material: Steel; Type of Clasp: Butterfly clasp — retrieved 2026-09-23
Not affiliated with OMEGA. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.