Omega Calibre 8520

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Omega SA is a Swiss watch manufacturing company with a long tradition that is synonymous with luxury and reliability. Throughout history, many of the most famous and affluent people from all over the world have donned their various watches, from James Bond to John F. Kennedy. Actually, one of the brand’s products – the Omega Speedmaster even made it to the moon during the landing of 1969.

Needless to say the Biel based brand is one of the highest regarded when it comes to watch making, and they have continued to produce some of the highest quality and most famous watches around from the year 1848, when the company was founded until present day and will probably continue to do so for many years and decades to come.

The 8520 calibre is a movement that was created as part of the 8500 range, launched back in 2007, which marked an important step in the history of this luxury watch producer, helping the company position itself as one of the most reliable time pieces manufacturer there is.

This particular calibre 8520 was designed for use with the Seamaster Planet Ocean Omega Co-Axil 37.5mm. Built entirely in-house, the 8520 is another example of fine craftsmanship that you can only expect from a Swiss watch making company like Omega. As the name puts it, the 8520 calibre uses (just like the 8500 series) the co-axial escapement mechanism, which represents a guarantee of technological advancement and efficiency. While the series of calibres 8500 were dubbed the first to have fully exploited the potential of the Co-Axial escapement mechanism, the 8520 takes it even further.

Picture of Omega Constellation Movement

A self-winding movement, the 8520 features a free sprung-balance system that includes a silicon balance-spring. The automatic winding can be done in either direction, allowing for prompt time settings when the occasion calls for it.

As part of the Seamaster range, the movement is water resistant to a depth of 600 metres (60 bar).  This means it can be worn when going for a short dive or a swim with no fear of damages or other unwanted consequences.

The calibre contains 28 jewels in total, including a sapphire crystal back that provides a clear view of the movement thanks to its transparency. The shock system is a nivachoc, providing high class protection for the watch, which has a rhodium plated finish and includes an exclusive Geneva Waves arabesque that greatly adds to the aesthetic appeal of the piece.

The crown of this luxury watch has 3 positions, the first of these being in the standard position, which is resting against the case of the watch, making it water resistant as well. Occasional winding can also be performed in this position should the watch be unworn for 50 hours, which is the battery reserve for this movement. This can be done by manually winding the crown when in the standard position.

The second is the correcting date, which works in correlation with the date feature of the movement. This is achieved by pulling the crown out once to its second position. Time setting is the final position for the crown, and allows the crown to be further pulled out to help set the time, which can be done so in either direction for ease.

Features include the date setting, a helium escape valve, a unidirectional rotating bezel, and the aforementioned screw-in crown. When it comes to diving watches and their movements, the 8520 and the Seamaster range are certainly up there with the best.


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