A small dial on the face of a watch. May be used as dual time zone indicator, alarm, moonphase, chronograph, etc. Maximum of four sub-dials on a watch?s face.
Smaller dial located on the watch face or main dial used for such purposes as displaying seconds or dates. A watch can have no sub-dials or several sub-dials.
a small dial located on the main watch's dial. There are individual functions assigned to sub-dials, such as small seconds indicator, 30-minute indicator, month counter, etc.
A small dial on a watch face used for any of several purposes, such as keeping track of elapsed minutes or hours on a chronograph or indicating the date.