The first Tank watch design originated in 1917 as a tribute to allied forces in Europe, the links of the metal bracelet referring to their powerful tracked vehicles.Breathtakingly modern. Case dimension: 23*23 mm . Each item FREE come with Cartier Jewellery. Red pouch & Red box & gift bag & Anti-tarnish Silver Polishing Cloth. 925 Sterling Silver Or 18CT Gold. 100% High Quality & Authentic Guarantee.