Trench watch

The first series of purpose-made men’s wristwatches was produced by Girard-Perregaux in 1880 for the German Navy.

[5] During World War I numerous companies, including Omega, Longines, Elgin and others produced wristwatches for the military.

[6][better source needed] These watches were of virtually identical style with an enamel dial, wide white numerals and a luminescent radium hour hand.

[A] Often they did not bear the name of the manufacturer, though the movement, originally designed in the 1890s for ladies’ pendant watches, was marked "Swiss".

The lugs for a strap looked like a thick wire attachment to the classical round shape of pocket watches rather than an integrated part of the body of the later and modern wristwatches.