Yellow gold case on leather strap, 24 x 30 mm, pin buckle, white "Swiss" dial with roman numeral markers, chapter ring, "sword shaped" hands, quartz movement. The Cartier Tank, introduced in 1917, redefined watchmaking with a design inspired by the sleek lines of WWI armored vehicles. From the turmoil of the first mechanized conflict emerged a masterpiece of elegance and innovation, an iconic wristwatch that continues to captivate collectors and connoisseurs alike.