Watch GlossaryHacking Seconds

What Is Hacking Seconds?

Hacking seconds is a feature in mechanical timepieces that allows the user to accurately synchronise the seconds hand with a reference time source, such as an atomic clock. This feature is essential for professionals in industries like racing or aviation, where every second counts, literally. To activate this feature, the user pulls out the crown used to set the time. This action engages a lever or pin that interacts with the balance wheel, stopping its oscillations. As a result, the seconds hand freezes, allowing the wearer to set the watch to the exact second required.

Why Was Hacking Seconds Invented?

During World War I, military personnel sought an accurate timekeeping tool to coordinate their actions. Synchronising attacks and movements was crucial, and this is where hacking watches came into play. Featuring the hacking seconds function, these watches greatly aided in military operations, allowing soldiers within a unit to be perfectly synchronised. The demand for hacking watches continued into World War II. 

Over time, the hacking seconds function found its way into civilian watches, gaining favour among watch enthusiasts. One luxury brand known for incorporating this feature are IWC. Featured here is their Portugieser Perpetual Calendar 42, which includes the small hacking seconds function. Encased in a 42.4mm steel case, the watch is powered by the automatic 82650 calibre, providing a power reserve of approximately 60 hours.

Featured here is their Portugieser Perpetual Calendar 42, which includes the small hacking seconds function

Encased in a 42.4mm steel case, the watch is powered by the automatic 82650 calibre, providing a power reserve of approximately 60 hours

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