Reference 231.10.42.21.03.006 places this replica Seamaster in the 42mm Aqua Terra family with a blue dial. The teak-line texture runs horizontally across the dial face, catching directional light and creating a striped pattern visible at arm’s length. Omega built this generation of 42mm Aqua Terra models on the same platform as the 41mm variants but with extended case proportions that accommodate larger wrists and give the dial more surface area to display its finishing details.

Case & Movement Specs

• Case diameter: 42mm
• Dial: blue with horizontal teak line texture
• Crystal: sapphire with double-sided anti-reflective coating
• Bracelet: stainless steel with alternating brushed and polished links
• Movement: automatic with date complication
• Date position: 6 o’clock
• Water resistance: 150 meters

The 42mm case provides additional dial real estate that makes the teak lines more legible. Each groove is fractionally wider than on the 41mm version, giving the texture a bolder visual impact.

Caliber Breakdown

The automatic movement inside the 231.10.42.21.03.006 features a Co-Axial escapement visible through the exhibition caseback. The rotor is decorated with Geneva waves, and the bridges carry a rhodium finish. Power reserve sits in the range typical for modern Seamaster calibers, providing reliable timekeeping across a full weekend without needing a winder. The 600m Co-Axial Chronometer 232.30.46.51.01.002 shares the Seamaster platform but steps into true dive-watch territory with a dramatically thicker case and higher water resistance. Explore the full range through the Seamaster section to compare sizing and complications side by side.

How It Compares

Blue dials at 42mm hit a specific market: buyers who want the recognizable Aqua Terra aesthetic in a slightly larger package. The 42mm wears closer to a mid-size diver than a dress watch, which makes it a natural companion for weekend and casual settings. The bracelet taper and curved lugs keep the proportions from feeling oversized on wrists in the 7-inch range. If you are deciding between the 41mm and 42mm blue Aqua Terra, the choice comes down to whether you want the watch to blend in or stand out slightly. This larger blue Seamaster gives you that added presence without leaving the refined Aqua Terra design language behind.