The OMEGA Seamaster
Aqua Terra > 15,000 gauss

In 1969, we defied zero gravity on the way to the moon. And now, we defied magnetic fields on Earth. Discover the first truly antimagnetic mechanical watch.

Carrying on OMEGA’s history of creating great movements

At the heart of the watch is the OMEGA Co-Axial caliber 8508, one of the most dramatic technological innovations in recent memory. It is resistant to magnetic fields greater than 1.5 tesla (15,000 gauss), far exceeding the levels of magnetic resistance achieved by any previous watch movement and solving a problem that has challenged watchmakers for many decades.

The Seamaster Aqua Terra > 15,000 gauss is a 41.50 mm stainless steel Co-Axial chronometer presented on either a matching bracelet or a brown leather strap. It has a slightly yellowed lacquered black dial, sun-brushed from the centre and decorated with the distinctive vertical lines that define OMEGA’s popular Aqua Terra collection. The yellow transferred legend, “> 15’000 GAUSS” identifies the watch as a very special timepiece.

compass needle compass center

The result of extraordinary teamwork

The technology developed by a team of ETA, Asulab, Nivarox FAR and OMEGA engineers led to the first prototype of the movement. Unlike other efforts to combat the effects of magnetism, the OMEGA movement does not rely on a protective container inside the watchcase but on the use of selected non-ferromagnetic materials in the movement itself. Several patents are pending for the new movement which, even after exposure to a magnetic field greater than 15,000 gauss, still performs at a chronometric level as defined by COSC.

“…Magnetism has always been an issue
for watchmakers.”

Classic solution

With magnetic shield casing (0-1000 gauss)

Classic solution

With magnetic shield casing (stops working over 1000 gauss)

OMEGA solution

With non magnetic movement resisting > 15,000 Gauss.

No protective inner case

The previous approaches of attempting to resist magnetism with inner cases had some limitations: they couldn’t handle the challenge of the increased strength of permanent magnets and, from an aesthetic standpoint, they blocked the view of the movement, thus preventing the possiblility of a date window display.

Because the Seamaster Aqua Terra > 15,000 gauss doesn’t need to be protected by an inner case – the movement itself is anti-magnetic – it has a transparent sapphire crystal in its caseback that allows full view of the Co-Axial caliber 8508. There is also a date window at 3 o’clock.

A full four-year warranty

The Seamaster Aqua Terra > 15,000 gauss is water resistant to 15 bar (150 metres / 500 feet). With the combination of its Co-Axial mechanical movement and its Si14 silicon balance spring, it is so reliable that it is delivered with a four-year warranty.

Magnetism has always been an issue for watchmakers and magnets are now even more present in our daily lives than they have ever been before. Watchmakers have to deal regularly with the issue of magnetism, as it is necessary for them to demagnetize mechanical watches whose performance has been compromised by exposure to magnetic fields, a problem that will be solved with the new movement.

“…innovative technology that will change the Art of watchmaking.”

A revolution in the watchmaking industry

With the Seamaster Aqua Terra > 15,000 gauss, OMEGA has introduced innovative technology that will forever change the way the watchmaking industry approaches the ever-increasing challenges of magnetic fields.

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