A timeless piece of modern watchmaking, Cartier's Tank watch is an icon that never ceases to renew itself. Designed by Louis Cartier in 1917, the Tank watch is an icon of modern watchmaking. The functionality and refined design of this wristwatch, combining geometry and harmony, defines its strong identity. Immediately recognizable and always in step with the times, the Tank watch has been reinterpreted for more than a century through multiple variations that are forever faithful to the spirit of the original design: Tank Cintrée, Tank Chinoise, Tank Américaine, Tank Française, and, more recently, the relaunch of the Tank Must. Augmented with a chapter on new models created since 2017, this fourth edition of an essential reference on the Tank watch offers a journey into the heart of the myth. Thanks to numerous archival documents and some previously unpublished photographs, the book explores, through the passionate pen of a true connoisseur, the most significant Tank watches and their technical characteristics, while drawing portraits of famous clients who, over time, have been seduced by this timeless timepiece.