The Lightness Wars continue today with the release of the new Seamaster Planet Ocean Dark Grey, a ceramic dive watch with a GMT complication that isn?t just another ceramic sports watch. The new reference is filled with technological advancements on the materials and watchmaking fronts that Omega claims give it an improved strength to weight ratio compared to prior watches made from similar materials.

Omega?s first big innovation here is the use of silicon nitride ceramic for the case, a lighter ceramic compound that is also very robust. Omega claims it is two times lighter than the Zircon ceramic used throughout the rest of their catalog, and according to their spec sheet the watch weighs in at 107 grams. The color of the case is a cool grey, and seems clearly intended to evoke the tactical lightweight feel of titanium.
The other (and perhaps more significant) feature of the new Seamaster is that the dial and movement are both made from titanium, which goes a long way to reducing the total weight of the watch. The movement inside is the Master Chronometer Calibre 8906, which of course has been given the full METAS treatment. 

All that titanium on the inside and fancy ceramic on the outside will hopefully lead to featherweight wearing experience, because this watch is big by any standard. The case measures 45.5mm in diameter and 17.4mm tall. The lug to lug measurement is 51.5mm, which seems almost reasonable given the hefty diameter. It?s a Planet Ocean, ...