Rolex Daytona vs Omega Speedmaster Moonwatch
Rolex Cosmograph Daytona 126500LN-0001 vs Omega Moonwatch 310.32.42.50.01.001, compared on the specs each brand publishes.
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The short answer
The two most famous chronographs, compared on the specs Rolex and Omega publish.
- Case size: the Omega Moonwatch 310.32.42.50.01.001 is 2 mm larger (42 mm vs 40 mm).
- Water resistance: the Rolex Cosmograph Daytona 126500LN-0001 is 50 m more (100 m vs 50 m).
- Power reserve: the Rolex Cosmograph Daytona 126500LN-0001 is 22 hours longer (72 h vs 50 h).
- Price: the Omega Moonwatch 310.32.42.50.01.001 lists for $9,500 less in the US ($7,400 vs $16,900).
- Movement: Rolex Cosmograph Daytona 126500LN-0001 has Automatic; Omega Moonwatch 310.32.42.50.01.001 has Manual-wind.
Side-by-side specs
| Spec | Rolex Cosmograph Daytona 126500LN-0001 | Omega Moonwatch 310.32.42.50.01.001 |
|---|---|---|
| Case diameter | 40 mm | 42 mm |
| Thickness | Not published by Rolex | 13.18 mm |
| Lug-to-lug | Not published by Rolex | 47.5 mm |
| Lug width | Not published by Rolex | 20 mm |
| Calibre | 4131 | Omega 3861 |
| Movement | Automatic | Manual-wind |
| Power reserve | 72 h | 50 h |
| Water resistance | 100 m | 50 m |
| Crystal | Sapphire | Acrylic |
| Case material | Stainless steel | Stainless steel |
| Ships on | Bracelet | Fabric strap |
| Weight | Not published by Rolex | 91 g |
| US list price | $16,900 (US list) | $7,400 (US list) |
| Dial | White, black counter rings | Black |
| Certification | COSC chronometer (Rolex Superlative Chronometer) | METAS Master Chronometer |
| Chronograph | Yes | Yes |
| Status | In production | In production |
| Suits wrists of about our sizing guide | 16.0–17.9 cm | 16.8–18.7 cm |
Specs summarised in our own words from the brand's product pages: 126500LN-0001 source (checked 3 Nov 2026) 310.32.42.50.01.001 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 Moonwatch 310.32.42.50.01.001 is 2 mm larger (42 mm vs 40 mm).
- Water resistance: the Rolex Cosmograph Daytona 126500LN-0001 is 50 m more (100 m vs 50 m).
- Power reserve: the Rolex Cosmograph Daytona 126500LN-0001 is 22 hours longer (72 h vs 50 h).
- Price: the Omega Moonwatch 310.32.42.50.01.001 lists for $9,500 less in the US ($7,400 vs $16,900).
- Movement: Rolex Cosmograph Daytona 126500LN-0001 has Automatic; Omega Moonwatch 310.32.42.50.01.001 has Manual-wind.
- Calibre: Rolex Cosmograph Daytona 126500LN-0001 has 4131; Omega Moonwatch 310.32.42.50.01.001 has Omega 3861.
- Crystal: Rolex Cosmograph Daytona 126500LN-0001 has Sapphire; Omega Moonwatch 310.32.42.50.01.001 has Acrylic.
- Certification: Rolex Cosmograph Daytona 126500LN-0001 has COSC chronometer (Rolex Superlative Chronometer); Omega Moonwatch 310.32.42.50.01.001 has METAS Master Chronometer.
Wrist fit
Lug-to-lug decides overhang more than diameter does. Enter your wrist to see how each one should wear.
- Rolex Cosmograph Daytona 126500LN-0001 –
- Omega Moonwatch 310.32.42.50.01.001 –
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.
Strap fit
Rolex doesn't publish the lug width of the Rolex Cosmograph Daytona 126500LN-0001, so measure it before buying a strap. The Omega Moonwatch 310.32.42.50.01.001 has 20 mm lugs. Size charts: Rolex size chart · Omega lug width chart.
Which should you buy?
It is the more compact case on paper (40 mm across). Our sizing guide puts it at about 16.0–17.9 cm.
It has the lower US list price, $7,400, a $9,500 difference.
It has the higher water-resistance rating: 100 m vs 50 m.
It has the longer published power reserve: 72 h.
Prices and where to buy
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More: All Rolex Cosmograph Daytona references · All Omega Speedmaster references.
Questions
Which is bigger, the Rolex Cosmograph Daytona 126500LN-0001 or the Omega Moonwatch 310.32.42.50.01.001?
Per the brands, the Rolex Cosmograph Daytona 126500LN-0001 is 40 mm across and the Omega Moonwatch 310.32.42.50.01.001 is 42 mm.
Which is cheaper?
The Omega Moonwatch 310.32.42.50.01.001, at a US list price of $7,400 vs $16,900 when we checked.
Which is more water-resistant?
Rolex Cosmograph Daytona 126500LN-0001: 100 m. Omega Moonwatch 310.32.42.50.01.001: 50 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.