A rare example of a french torsion suspension or 400 day clock made by Claude Grivolas & Cie, the movement was invented and patented by Claude Grivolas. This example can be dated to the first half of 1910.The movement stamped No.A.10-2321-0 ‘SYSTÈMÉ BTÉ GDG DÈPOSÉ “PENDULE 400 JOURS” PARIS, with the Claude Grivolas crossed CG on the back plate, the year running movement is of the highest quality, the pendulum can be adjusted for time keeping with a key. The gilded four glass case is flanked by Corinthian columns with pin hinged doors to the front and back. The pristine enamel dial with blue Roman hours and Arabic minute ring is also signed by the maker, held within a gilded bezel with gilded fleur de lis and spear hands.Claude (Agricole-Louis) Grivolas was French engineer, investor, mechanic and inventor, watch and barometer producer. Born in Avignon in 1855 into a middle-class family. He followed evening classes from the community and eventually became an engineer.He marri...