Moser?s latest is the brand?s first ever release in tantalum, a rarely used metal with unique characteristics that make it one of the more rewarding metals in all of watchmaking. In other words, it has a beautiful aesthetic impact, but it takes a lot of work and knowledge to get it to that point. Using it at all is something of a flex for any brand, and Moser is throwing down the gauntlet to a certain extent with this release. Somewhat predictably, they?ve incorporated what has come to be the brand?s signature complication, a unique and easy to read perpetual calendar, into their first tantalum watch, all with an elaborate enamel dial with a distinct hammered texture. 

The clear highlight of the Endeavour Perpetual Calendar Tantalum Blue Enamel is the use of tantalum, so we?ll start there. Tantalum is extremely dense and strong, qualities which make it an excellent candidate as a case metal for a luxury watch. It?s also very corrosion resistant, and develops a very thin layer of oxidation when exposed to air that naturally protects it. Tantalum also has a gray-blue tone to it that is quite unlike any other metal, giving it a unique quality that no other metal can match.  The reason tantalum is so uncommon in watchmaking is because it is very difficult to machine thanks to a melting point that comes in around 3000 °C. It takes advanced technology and equipment to properly fabricate tantalum for watchmaking purposes, which of course requires not only a substant...