It’s ISO Certified
The big C had every right to slap on some dive parts to their existing case, fill it with their stellar in house movement (the 1904 MC) and pull up to the trade show with a big grin on their faces. But they didn’t. They started from scratch, seeking to make an honest “tool” watch, up to the exacting ISO standards of deep-sea ruggedness, while keeping with Cartier's famous aesthetics, which include steel and pink gold options.
It’s Built Like a Tank (No, not that Tank)
One of the best side effects of pursuing an ISO certification is that you have to build your watch to some seriously exacting standards—depth, pressure, construction quality, shock resistance, temperature fluctuation, and reliability. Not that Cartier didn’t always have the tools to make that happen (their 1917 “Tank" watch was literally modeled after a WWI tank, and their Santos was designed for a Brazilian Aviator in 1904) but the tools required for a Dive watch are significantly different. This watch is rated to 300m/1000ft, meaning that at 1000ft it will stand up to 441 pounds of pressure per square inch. Think about that for a second.