A clock with a sprung lid with a circular opening in the centre through which the time can be read when the lid is in the closed position. This type of case was most common on pocket watches. Before the introduction of the first shatterproof watch crystals in the 1920s, hunter cases were also sometimes used on wristwatches. Half-hunter pocket watches usually had a glass pane in the circular opening; half-hunter wristwatches usually did not have this pane.

A mark stamped on the case of a watch in order to provide information, for example, on the type and fineness of the precious metal, the country (and sometimes the city or canton) of origin, the year of manufacture, and the identity of the case manufacturer. The trademark or logo of the company that manufactured or delivered the watch, a reference number, and a serial number are also often stamped on the case.

Watch whose mainspring requires manual winding.

A mechanism in which a disc, printed with a series of digits from 1 to 12, replaces the hour hand. The current time is visible in digital format, i.e. it is displayed as one or more digits. One and the same number is visible for 60 minutes through a cut-out in the dial. After the minute hand reaches '12', this numbered disc suddenly jumps forward to display the next number, thus indicating that the next hour has begun.

Another name for the Swiss anchor escapement. The name comes from the hook-like shape of the teeth on the escape wheel.

A detail in the construction of some chronographs, an hour counter counts the number of hours that have elapsed since the start of a stop time sequence. Most hour counters can count a maximum of twelve hours. When the return-to-zero button is pressed, the hour counter hand also returns to its initial position.

Watch whose case has both a back cover and a spring-hinged front cover to protect its crystal.

A movement in which the fourth wheel and crown form a 90° angle with the centre of the watch. A small seconds dial is located at the '6'.