Omega Speedmaster Professional vs Casio G-Shock DW-5600 Square

Omega's design language vs Casio's approach

The Omega Speedmaster Professional features a Stainless Steel case at 42mm with Hesalite or Sapphire protection. The Casio G-Shock DW-5600 Square offers Resin construction at 42.8mm (Square) with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.

Manual-Winding Caliber 3861 vs Quartz Module 3229

The Speedmaster Professional runs the Manual-Winding Caliber 3861 (In-House Manual-Winding Manufacture (Co-Axial), 50 Hours power reserve) at 21,600 vph (3 Hz) frequency. The G-Shock DW-5600 Square uses the Quartz Module 3229 (Casio Digital Quartz (Battery), 2-Year Battery reserve) at standard. The Speedmaster Professional edges ahead on power reserve.

42mm vs 42.8mm (Square) — different wrist presence

At 42mm, the Speedmaster Professional wears more compactly on smaller wrists compared to the G-Shock DW-5600 Square at 42.8mm (Square). Water resistance differs: 50m (5 ATM) vs 200m (20 ATM).

Casio sits in the lower tier

The Omega Speedmaster Professional sits at $5,000–$10,000 and the Casio G-Shock DW-5600 Square at $50–$100. On the specs that outlast any price: the Speedmaster Professional uses Hesalite or Sapphire with 50 Hours, against Mineral Glass and 2-Year Battery on the G-Shock DW-5600 Square. Service intervals are typically 5-7 years for both.

50m (5 ATM) vs 200m (20 ATM)

The Speedmaster Professional is rated to 50m (5 ATM) while the G-Shock DW-5600 Square handles 200m (20 ATM). The G-Shock DW-5600 Square offers superior water resistance.