Glossary of Watch Terms.

watch measurements: the diameter or width of a watch case, along with the thickness of the case. At WorldofWatches.com, the case diameter is measured between the 2 o'clock to 7 o'clock hours on round watches. On non-circular cases...tank, square and rectangular watches...the case is measured by the width across. The thickness on all watches is measured from the top of the bezel to the bottom of the case.

water resistance: The ability to withstand splashes of water.

width: the measurement of a watch case tank, square, oval and rectangular style watches. See Watch Measurements.

winding stem: The button on the right side of the watch case used to wind the mainspring. Also called a "crown."

world time dial: A dial, usually on the outer edge of the watch face, that tells the time in up to 24 time zones around the world. The time zones are represented by the names of cities printed on the bezel or dial. The wearer reads the hour in a particular time zone by looking at the scale next to the city that the hour hand is pointing to. The minutes are read as normal. Watches with this feature are called "world timers."