Definition
The second-hand stopping function, also known as “stop-seconds” or “hack feature,” is a feature found in mechanical watches that allows the second hand to be halted, usually by pulling the crown. This makes it easier to precisely synchronize the watch with a time standard like an hourly signal or another watch.
Origin
This function originated in military settings, where accurate time synchronization was critical. Initially adopted in aviation and marine watches during the first half of the 20th century, it has become a desirable feature in civilian watches for the accuracy it offers.
Usage
The second-hand stopping feature is commonly used in mechanical watches aiming for precision and functionality. It’s especially prized by watch enthusiasts and in applications where exact time synchronization is important.
Examples
Many pilot and military watches have this feature.
Rolex watches, like the Oyster Perpetual, often include a second-hand stopping function.
Synonyms:
“Stop-seconds” and “hack feature” are terms commonly used to describe this function.
Related Terms
- “Crown”: The part of the watch that is pulled to activate the second-hand stopping feature.
- “Synchronization”: The act of adjusting the watch to match another time measure.
Tips
When adjusting a watch with a second-hand stopping function, pull the crown to the correct position and synchronize the watch with an accurate time source before restarting the second hand’s movement.
This function is particularly useful for those who need precise timing, like professionals working with timekeeping or exact scheduling.
Trivia
The second-hand stopping function was a significant innovation in watchmaking, representing the integration of specific practical needs (like those in the military) into watch design.
While it has its roots in practical and military applications, this function is now valued for its contribution to overall accuracy in luxury and everyday watches.