Watch Almanac

Omega Speedmaster Moonwatch Professional vs Rolex Cosmograph Daytona

The Rolex Cosmograph Daytona has a 0.3 mm longer lug-to-lug than the Omega Speedmaster Moonwatch Professional (47.8 mm vs 47.5 mm).

The Omega Speedmaster Moonwatch Professional has a 2 mm larger case than the Rolex Cosmograph Daytona (42 mm vs 40 mm).

The Omega Speedmaster Moonwatch Professional has a 1.6 mm thicker case than the Rolex Cosmograph Daytona (13.5 mm vs 11.9 mm).

Both suit the same wrists on our fit model (6.75"–8").

They share a 20 mm lug width, so straps swap between them.

At US retail the Rolex Cosmograph Daytona costs $9,100 more ($16,900 vs $7,800).

On your wrist

Omega Speedmaster Moonwatch ProfessionalIdeal fit
Wrist flat: 55.1 mmLug-to-lug: 47.5 mm
Rolex Cosmograph DaytonaIdeal fit
Wrist flat: 55.1 mmLug-to-lug: 47.8 mm

Side by side

Omega Speedmaster Moonwatch ProfessionalRolex Cosmograph Daytona
Reference310.30.42.50.01.001126500LN
Case diameter42 mm40 mm
Lug-to-lug47.5 mm47.8 mm
Thickness13.5 mm11.9 mm
Lug width20 mm20 mm
Water resistance50 m100 m
MovementOmega 3861 (manual)Rolex 4131 (automatic)
Power reserve50 hours72 hours
Crystalhesalitesapphire
StyleChronographChronograph, Sport
Retail (US)$7,800$16,900