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How do mechanical watches store energy? - Wishdoit Watches

How do mechanical watches store energy?

Mechanical watches are powered by a coiled spring known as a mainspring. As this spring uncoils, the amount of time that the watch can run diminishes. This remaining amount of time is referred to as the power reserve, winding indication, or up/down indication. An indication turning through an angle or a linear indicator appears on the dial to display the power reserve, similar to a car’s fuel gauge.

What is Winding Stem? - Wishdoit Watches

What is Winding Stem?

The winding stem is the interface between the exterior and interior of a watch. Manipulation of the winding stem by turning, pulling, and pushing the crown winds and sets the mechanical movement. 
Do you know the Dual Time? - Wishdoit Watches

Do you know the Dual Time?

A dual-time watch has two hour hands in order to indicate time in two different time zones. This complication is popular with travelers, as it allows the wearer to set a “home” time zone for quick reference. The second hour hand is sometimes referred to as the GMT or UTC hand.