Omega Seamaster Planet Ocean Big Size 2900.50.37 is a classic among modern diver watches. A large steel case, black dial and the characteristic design of the first generation of Planet Ocean create a model that looks extremely good even after many years.
The Planet Ocean collection debuted in 2005 and from the very beginning it was firmly embedded in Omega’s diving DNA. The first generation already offered water resistance up to 600 meters, a helium valve and Co-Axial mechanisms. Thanks to this, it was a real diving watch from the very beginning, and not just a sports model inspired by divers.
The presented Big Size version has a diameter of 45.5 mm. This is definitely a typically men’s size and a great choice for a larger wrist. At the same time, the proportions of the first generation mean that the watch does not look as massive as many later Planet Oceans.
The big advantage of this generation is the design based on the caliber 2500. The mechanism allowed for maintaining a relatively slim case for a professional diver with a diameter of 45.5 mm. Therefore, the watch has a strong presence without becoming excessively tall on the wrist.
The black dial is simple and very legible. Large indexes, wide hands and characteristic Arabic numerals at 6, 9 and 12 o’clock perfectly match the sporty character of Planet Ocean. In addition, the date display is discreetly placed at 3 o’clock.
The whole is complemented by a black, unidirectional diving bezel. In turn, the characteristic helium valve at 10 o’clock is one of the most recognizable elements of the entire Seamaster Planet Ocean line.
Inside, there is an automatic Omega caliber 2500 with a Co-Axial escapement. The movement is chronometer certified and offers approximately 48 hours of power reserve. Moreover, it operates at a frequency of 3.5 Hz.
For me, the caliber 2500 is one of the greatest advantages of this generation. We get the proven Co-Axial mechanism, and at the same time the case retains much more classic proportions than in many later versions of Planet Ocean.
The watch also offers a screw-down crown, a helium valve and an impressive water resistance of 600 meters. Therefore, despite its elegant character, it remains a full-fledged diving watch.
From the factory, reference 2900.50.37 was offered on a brown alligator strap with an Omega folding clasp. The presented item is combined with a rubber strap, which, in my opinion, even better emphasizes the sporty character of Planet Ocean.
The offered copy comes from 2007. What’s more, it comes from the Polish distribution of W.KRUK, which is a very interesting additional element of the history of this particular watch.
The set includes all original boxes and documents from 2007.
Very good condition. Only minor traces of use are visible, mainly in the form of micro-scratches.
The envelope has retained very nice edges. The mechanism is fully functional.









