Omega
Seamaster Aqua Terra >15,000 Gauss
231.10.42.21.01.002
The watch that redefined antimagnetic performance for the modern era.
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Overview
The Omega Seamaster Aqua Terra >15,000 Gauss is a landmark sports watch that brought antimagnetic engineering to the forefront of mainstream horology. Housed in a 41.5 mm stainless steel case, it pairs a bold black teak-pattern dial with yellow accents to signal its technical purpose at a glance. Calibre 8508, the movement at its heart, achieves resistance to magnetic fields exceeding 15,000 gauss — a figure that far surpasses traditional antimagnetic standards.
History
Introduced in 2013, the >15,000 Gauss was developed in response to the growing prevalence of magnetic fields in everyday environments — from electronic devices to airport security equipment — that can disrupt conventional lever-and-balance movements. Omega achieved this resistance not through a soft-iron inner cage, as was the traditional approach, but by constructing the movement's critical components from inherently non-ferromagnetic materials, a significant engineering departure. The reference 231.10.42.21.01.002 was produced through approximately 2017, during which time it helped catalyse an industry-wide conversation about antimagnetic watchmaking. Its legacy is visible in the subsequent METAS Master Chronometer certification programme that Omega adopted for later generations.
Notable points
- Calibre 8508 resists magnetic fields in excess of 15,000 gauss, far beyond the 4,800-gauss threshold of the earlier Milgauss standard.
- Antimagnetic performance is achieved through non-ferromagnetic alloys in key movement components rather than a traditional soft-iron Faraday cage.
- The black teak-pattern dial — a signature Aqua Terra design element — is accented in yellow, visually distinguishing this technical variant within the line.
- The 41.5 mm stainless steel case places the watch at the larger end of the Aqua Terra family, suited to a sport-oriented wearing context.
- Production spanned roughly 2013 to 2017, making surviving examples a focused chapter in Omega's antimagnetic development story.
Specifications
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