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A subdial, also known as a subsidiary dial, is a smaller dial located on the main dial of a watch. It serves to display additional information beyond the basic timekeeping function. Subdials are commonly found on chronograph watches, where they are used to measure elapsed time, often displaying seconds, minutes, and hours separately. They can also indicate other functions such as a second time zone, power reserve, or moon phase. The design of subdials can vary, typically appearing in round or square shapes, and their number can range from one to four, depending on the watch's complexity and intended functions. Subdials enhance the functionality and aesthetic appeal of a watch, providing users with more detailed information at a glance.
A subdial is a smaller auxiliary dial within the main dial displaying specific complications: chronograph elapsed time (seconds, minutes, hours), running seconds (small seconds), date, power reserve, dual time zones, or moon phase. They add functionality without cluttering the primary time display.
Typically, the central chronograph hand tracks elapsed seconds on the main dial. Subdials show: 30-minute counter (left), 12-hour counter (right), and running seconds (bottom). Layout varies by manufacturer. Start the chronograph and read the subdials like mini clocks to track elapsed time.
No, many watches display only hours, minutes, and seconds on the main dial without subdials. Subdials appear on complicated watches with additional functions like chronographs, dual time, or power reserve indicators. Simple three-hand watches typically don't include subdials.
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