Louis Erard Unveils the Limited-Edition Gravée Main

Since 2021, Louis Erard has been redefining the boundaries of Métiers d’Art, from Grand Feu enamel and guilloché to wood marquetry, and soon, gold wire inlay. Now, Gravée Main opens a new chapter, paying tribute to one of the oldest crafts in watchmaking hand engraving.
Gravée Main represents a new milestone in Louis Erard’s Métiers d’Art series. This limited edition of 99 unique timepieces places hand engraving at center stage, with every metal element entirely engraved and finished by hand, a meticulous process that requires more than 50 hours of work.

Glossary

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Glossary
frequency

frequency

the number of vibrations performed by the hairspring per hour. Frequency is an important indicator of accuracy and performance in a watch. The higher the frequency, the greater the accuracy and stability in timekeeping. A higher frequency improves the watch's accuracy and reduces the impact of external factors on its movement. Conversely, a lower frequency reduces the accuracy of the watch and makes it more susceptible to external changes. The frequency of a watch is measured in hertz (Hz).

The frequency of a watch varies among different timepieces and depends on the internal movement of the watch. In automatic mechanical watches, the frequency typically ranges from 2.5 Hz to 5 Hz, which translates to 2.5 to 5 vibrations per second. On the other hand, in quartz watches, the frequency is very high and can range in the tens of thousands of hertz.