Seamaster Aqua Terra 150 M > 15,000 gauss – a technological marvel

The Seamaster Aqua Terra > 15,000 gauss is a 41.50 mm stainless steel Co-Axial chronometer is a very special timepiece. At the heart of the watch is the OMEGA Co-Axial caliber 8508. 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.

The technology developed by a team of ETA, Asulab, Nivarox FAR and OMEGA engineers led to the caliber 8508. This 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. Even after exposure to a magnetic field greater than 15,000 gauss, still performs at a chronometric level as defined by COSC.

Traditionally, watchmakers use soft iron inner casings to protect the internals. This method has some limitations: There is a limit before the protective inner casing cave-in to stronger magnets and, from a design perspective, there cannot be gaps in the inner casing i.e. a date window display or a display case-back is not possible.

The Seamaster Aqua Terra > 15,000 gauss doesn’t face such limitations hence it is able to put in place a transparent sapphire crystal in its case-back as well as a date window.

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 also comes with an Omega four-year warranty.

When this watch first came out in Basel2013, I have decided to put it as one of my targets. Can’t wait for it to arrive on Malaysian shores.


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