Based in La Chaux-de-Fonds, La Joux-Perret currently produces about 150,000 movements per year, Hodinkee reported in a recent article on the manufacturer. They range from its workhorse time-only movement, the G100, to its column-wheel chronograph movement, the L100, as well as high-end tourbillon and monopusher chronograph movements. It also makes the Solargraph movement, developed in association with Tag Heuer and first used in the Aquaracer, a critical component for the brand.
The Solargraph recharges with sunlight or artificial light with no battery change required and needs only two minutes of full sunlight to power a watch for a full day. Less than 20 hours under strong sunlight gives the Solargraph six months of autonomy, and it is also used in the revival of the Tag Heuer Formula 1 watch, which has proven a hit as LVMH has become the title sponsor of the top motor sports series. The companies say the solar movement partnership also extends to the development of a movement that now powers the Rope watch by Tiffany & Co, and it will continue to develop with other Maisons of the LVMH group.