Cartier Tank Américaine

An elongated Tank with a curved case, after a model of the 1920s.
The Tank Américaine was based on the Tank Cintrée of 1921. It was meant for the American market but sold all over the world.
Materials: Gold or steel; mechanical or quartz movement
Manufacture: Made in Switzerland; the case is curved to follow the wrist.
The long, narrow shape curved lengthwise.
Roman numerals and a railway track on the dial.