The Omega Co-Axial Ploprof 1200M. Omega's 2009 launching timepieces.

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(Omega Co-Axial Ploprof 1200M)

In 1970 Omega launched a watch created and specially designed for withstanding the crushing pressures endured by divers working deep below the ocean’s surface. The Seamaster 600, also-called ‘Ploprof’ (the acronym formed from the first letters of plongeurs professionnels) was one of the roughest, robust and seaworthy divers’ wristwatches ever manufactured.
In 2009, Omega is introducing an updated version of the classic and instantly recognizable Omega Seamaster 600 wristwatch. Equipped with a Co-Axial calibre 8500, the new Ploprof 1200M is, as the name suggests, is surprisingly water-resistant to 1200 metres (4000 feet). It also deviously combines its ancestor’s famous features with the brand’s state-of-the-industry Co-Axial technology for its movement.

Source: Europa Star Magazine Issue