oris 648 chronometer

Oris ProDiver 51mm Chronograph diving watch in TitaniumLooking for the big one? Well, looks like the new Oris ProDiver Chronograph 51mm diving watch is just the right size for you.The diving watch was revealed three months ago and has a good chance to become a hit among professional divers that are tired from the omnipresent Submariners and Sea-Dwellers.Besides an impressive water resistance rating of 1000m, this new timepiece also features their patent-pending proprietary Rotation Safety System that effectively protects the scratch-proof ceramic bezel from being accidentally rotating. According to the company, in order to turn the bezel counterclockwise, you need to first lift its outer part. Almost like it is done in child-proof packaging, I guess.The watch also sports an automatic helium-escape valve, screw-in pushpieces and winding crown, and it comes with a spare rubber strap that you can easily put in place of the original titanium bracelet.Its huge case, which is 51mm in diameter and whooping 22 millimeters high, has enough interior space to provide room for the Oris Caliber 674 movement, which is based on the time-proven Valjoux 7750 natural-born chronograph engine.Of course, this is not the best watch to wear even if you prefer Levi’s to tuxedo, but its size will definitely not be an issue if you plan to wear it with a diving suit.

With its Big Crown collection, Oris demonstrates expertise in the field of tribute watches to historical aircraft. Inspired by the Bell X-1, the first plane to break the sound barrier, the Big Crown X1 Calculator refers to this era when flight plans were still made using slide rules, and accentuates this unique mechanism. Its rotating bezel serves to adjust the slide rule and to calculate fuel consumption for a given flight time, while the caseback displays a m/ft conversion table for international use. The chronograph push-pieces bear the X and 1, like a last nod to the date of the historical feat accomplished at 10:18 on October 14th 1947