Cartier Tank series issued by Cartier watches.Invented by Louis Cartier in 1917, and inspired by the new Renault tanks used on the western front, and prototype watch presented by Cartier John General Pershing American Expeditionary force.
The watch lines and proportion is similar to tank found on First World War battlefields;it is a square and rectangular in order to hide from view, with its hidden in the vertical side plates.