GCA3900
To make the GCA3900’s jumping hours disc advance instantaneously, the Maison’s engineers had to generate up to 70,000 times the force of a conventional movement.
A masterpiece of engineering
In developing the Swiss Manufacture GCA3900 Calibre Jumping Hours, the Maison’s engineers faced significant physical challenges: the jumping hours disc, 25 times heavier than a conventional hour hand, must advance instantaneously once every hour. According to Newton’s second law, this sudden acceleration demands a force orders of magnitude greater, up to 70,000 times, than that required in a traditional three-hand movement.
