Cartier did something interesting this year at Watches & Wonders by making a concerted effort to democratise the Tank, which is arguably their single most iconic design. It?s a truly great looking template for a watch, comes in a variety of sizes, looks great on men and women, and is a true bit of watch culture and history. As the story goes, the Tank was created by Louis Cartier in 1917, with case lines inspired by the Renault FT-17 tanks used in the first World War. The rectangular shape of the watch was out of step with circular case designs of the time period, and both the tank itself and the watch it inspired were seen as highly modern designs at the time. Over the course of the watch?s one hundred year history, it?s come to define a certain type of elegance, which is certainly more than can be said for the FT-17, important to the war effort though it was.  Cartier introduced two new affordable lines of the Tank watch this month, with one seeming to look forward, and another taking a glance back at a peculiar time in Cartier?s history. I?ve already written a bit about the SolarBeat Tank Must in our Watches & Wonders roundup coverage, but needless to say, this is the Tank that seems to be looking toward Cartier?s future. From the outside, it has the appearance of any other Tank (one of the charms of this watch is that like other icons such as the Speedmaster and the Submariner, it simply hasn?t changed much over the years), but inside the watch runs on a sol...