Built around the 231.10.42.21.01.004 reference, this replica Seamaster 231104 offers a 150m-rated sport watch in the 42mm diameter that many collectors consider the ideal size for all-day wear. The black dial with applied luminous markers and a date window at three o’clock follows the established Seamaster Aqua Terra layout from the 231 generation with proven proportions. The stainless steel case and bracelet feature alternating brushed and polished surfaces that catch light differently depending on angle and movement throughout the day.

Technical Overview

• Case diameter: 42mm
• Case material: stainless steel with mixed finishing
• Dial: black with applied luminous hour markers and hands
• Crystal: sapphire with anti-reflective coating
• Water resistance: 150m
• Bracelet: stainless steel with deployant clasp
• Movement: automatic with hacking seconds
• Functions: hours, minutes, central seconds, date

The 150m rating positions this as a water-resistant sport watch rather than a dedicated deep-dive instrument. For the vast majority of real-world scenarios including swimming, snorkeling, and unexpected rain, 150 meters provides more than enough safety margin without requiring the thicker case construction that higher ratings demand.

Inside the Movement

The automatic caliber handles time, date, and a hacking seconds function that allows precise synchronization when setting the watch. The 231 generation used movements with co-axial escapement technology, which reduces friction between escapement components and extends service intervals compared to conventional lever escapements used in most mechanical watches. For a view of how the Aqua Terra family branches into different configurations, see the Aqua Terra 150m 231.10.42.21.01.002, which shares the same case dimensions but pairs with a different dial treatment and detail execution. Both belong to the Seamaster catalog and represent the 231 series at its most refined expression.

What Sets It Apart

The 42mm case size hits a comfortable middle ground that wears large enough to feel substantial without crossing into oversized territory on average wrists. The black dial with luminous markers keeps the overall look serious and tool-oriented, while the polished center bracelet links add just enough visual warmth to prevent the watch from appearing sterile or purely utilitarian. This replica Seamaster 231104 gives you the previous-generation Omega aesthetic with proportions that still hold up confidently against newer references.