trench watch
type of watch that came into use by the military during World War I, as pocket watches were not practical in combat; it was a transitional design between pocket watches and wrist watches, incorporating features of both
en-GB/ˈtɹɛnt͡ʃ ˈwɒt͡ʃ/
en-US/ˈtɹɛnt͡ʃ ˈwɑt͡ʃ/