Omega Constellation vs Rolex Datejust 36
Omega Constellation 131.10.39.20.02.001 vs Rolex Datejust 126231-0017, compared on the specs each brand publishes.
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The short answer
Two dressy everyday watches with integrated-look bracelets, compared on published specs.
- Case size: the Omega Constellation 131.10.39.20.02.001 is 3 mm larger (39 mm vs 36 mm).
- Water resistance: the Rolex Datejust 126231-0017 is 50 m more (100 m vs 50 m).
- Power reserve: the Rolex Datejust 126231-0017 is 15 hours longer (70 h vs 55 h).
- Price: the Omega Constellation 131.10.39.20.02.001 lists for $8,850 less in the US ($7,400 vs $16,250).
- Calibre: Omega Constellation 131.10.39.20.02.001 has Omega 8800; Rolex Datejust 126231-0017 has 3235.
Side-by-side specs
| Spec | Omega Constellation 131.10.39.20.02.001 | Rolex Datejust 126231-0017 |
|---|---|---|
| Case diameter | 39 mm | 36 mm |
| Thickness | 12.43 mm | Not published by Rolex |
| Lug-to-lug | 41 mm | Not published by Rolex |
| Calibre | Omega 8800 | 3235 |
| Movement | Automatic | Automatic |
| Power reserve | 55 h | 70 h |
| Water resistance | 50 m | 100 m |
| Crystal | Sapphire | Sapphire |
| Case material | Stainless steel | Steel and gold |
| Ships on | Bracelet | Bracelet |
| Weight | 158 g | Not published by Rolex |
| US list price | $7,400 (US list) | $16,250 (US list) |
| Dial | Silver | White |
| Certification | METAS Master Chronometer | COSC chronometer (Rolex Superlative Chronometer) |
| Status | In production | In production |
| Suits wrists of about our sizing guide | 15.5–17.4 cm | 14.3–16.2 cm |
Specs summarised in our own words from the brand's product pages: 131.10.39.20.02.001 source (checked 3 Nov 2026) 126231-0017 source (checked 3 Nov 2026). "Not published" means the brand page we checked doesn't list it, so we leave it blank rather than guess.
All the differences
- Case size: the Omega Constellation 131.10.39.20.02.001 is 3 mm larger (39 mm vs 36 mm).
- Water resistance: the Rolex Datejust 126231-0017 is 50 m more (100 m vs 50 m).
- Power reserve: the Rolex Datejust 126231-0017 is 15 hours longer (70 h vs 55 h).
- Price: the Omega Constellation 131.10.39.20.02.001 lists for $8,850 less in the US ($7,400 vs $16,250).
- Calibre: Omega Constellation 131.10.39.20.02.001 has Omega 8800; Rolex Datejust 126231-0017 has 3235.
- Certification: Omega Constellation 131.10.39.20.02.001 has METAS Master Chronometer; Rolex Datejust 126231-0017 has COSC chronometer (Rolex Superlative Chronometer).
- Case material: Omega Constellation 131.10.39.20.02.001 has Stainless steel; Rolex Datejust 126231-0017 has Steel and gold.
Wrist fit
Lug-to-lug decides overhang more than diameter does. Enter your wrist to see how each one should wear.
- Omega Constellation 131.10.39.20.02.001 –
- Rolex Datejust 126231-0017 –
Same rule of thumb as Watch Finder: case diameter of about 23.5% of your wrist circumference (−2 mm to +2.5 mm), and lug-to-lug no longer than about 29% of it plus 1 mm. A guide, not a rule; flat or round wrists differ.
Which should you buy?
It is the more compact case on paper (36 mm across). Our sizing guide puts it at about 14.3–16.2 cm.
It has the lower US list price, $7,400, a $8,850 difference.
It has the higher water-resistance rating: 100 m vs 50 m.
It has the longer published power reserve: 70 h.
Prices and where to buy
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More: All Omega Constellation references · All Rolex Datejust references.
Questions
Which is bigger, the Omega Constellation 131.10.39.20.02.001 or the Rolex Datejust 126231-0017?
Per the brands, the Omega Constellation 131.10.39.20.02.001 is 39 mm across and the Rolex Datejust 126231-0017 is 36 mm.
Which is cheaper?
The Omega Constellation 131.10.39.20.02.001, at a US list price of $7,400 vs $16,250 when we checked.
Which is more water-resistant?
Omega Constellation 131.10.39.20.02.001: 50 m. Rolex Datejust 126231-0017: 100 m.
Have you tested these watches?
No. This comparison uses brand-published specs and our own analysis of them, not hands-on testing.
Watch.co is independent and not affiliated with any brand. We haven't handled these watches for this page: everything here comes from brand-published specs and our own analysis. Brand names are used only to identify products.