According to the website PrestigeTime.com, the word “bezel” is used to describe the ring that is situated on the top of the watch casing. Time increments are often indicated on the bezel of a watch. Bezels that may be moved can perform additional purposes, such as keeping track of the time that has passed. Bezels, on the other hand, may be fixed, which means that they do not move.
According to PrestigeTime.com, a bezel that may rotate in either direction is referred to as either a uni-directional rotating bezel or a bi-directional rotating bezel. While the latter may revolve in either the clockwise or counterclockwise direction, the former can only rotate in one way. Depending on the watch, the bezels may have gems set into them or they may be plain without any embellishment at all.