With the names of 23 cities engraved into its rotating bezel representing every time zone in the world, this watch allows you to simply change times zones with a twist. A precise mechanism in the watch automatically calculates the difference in Greenwich Mean Time when you place the city you are traveling to at the 12 o'clock position. If the city is currently using daylight saving time, you need only align the city with the DST marker on the watch's face. The luminous hands indicate the time in the dark. With day/night indicator and a subface that displays the seconds of each minute. The water-resistant case, band, and bezel are made from stainless steel. Tempered glass dome. Watch case 1/2" D x 1 3/4" Diam. (6 1/2 oz.)