Which was the world's first wrist watch?

Answer 1

The first wrist watch (then called a wristlet) was made for women by Patek Philippe. It contained a small pocket watch movement and the case was attached to the wrist by a ribbon or cord. The first mens wrist watch is generally accepted to have been made on commission to the German Army by Girard-Perregaux shortly before the end of the 19th century. The first wrist watch to go on general sale to the public was the Cartier Santos (although not called that at the time) in 1906 a year after the one Louis Cartier made for an aviator friend of his, Alberto Santos-Dumont.