Girard-Perregaux has unveiled the Calibre GP4800, a technically advanced movement that represents both cutting-edge innovation and homage to the manufacture’s storied heritage.
The compact movement measures 25.60mm in diameter with 4.28mm thickness, designed specifically for modern case sizes while maintaining the architectural DNA that has defined Girard-Perregaux since 1791. Despite its reduced dimensions, the GP4800 incorporates sophisticated technology including a complete silicon escapement featuring escape wheel, pallet lever, and roller crafted from the lightweight, non-magnetic material.
Silicon’s exceptional properties deliver significant advantages over traditional steel components. The material’s smooth surface reduces friction while its hardness and wear resistance enhance long-term reliability. These characteristics, combined with optimal shaping for maximum efficiency, contribute to superior chronometric performance and the movement’s impressive 55-hour power reserve.
The caliber features a variable-inertia balance system that replaces traditional raquette regulation. Instead of adjusting the effective length of the balance spring, four white gold timing screws mounted on the balance wheel rim allow precise rate adjustment while maintaining the spring’s fixed length. This approach, combined with an 8 mg per cm balance wheel inertia, provides enhanced shock resistance and stability.
An upgraded winding system incorporates an oscillating mass mounted on ceramic ball bearings with integrated shock absorbers. This configuration reduces winding noise while improving durability, transmitting motion through a ball-bearing clutch system that winds the mainspring barrel unidirectionally. The powerful barrel generates significant torque, contributing to both extended power reserve and improved amplitude stability.
Aesthetically, the movement honors Girard-Perregaux’s legendary heritage through three bridges inspired by Constant Girard’s revolutionary 1867 Tourbillon with Three Bridges. The skeletonized balance bridge, affixed at two points for enhanced stability, allows clear viewing of the balance wheel, spring, and silicon escapement in motion. Symmetry guides the design philosophy, reflecting Constant Girard’s architectural principles.
The finishing encompasses ten distinct decorative techniques, demonstrating the manufacture’s commitment to traditional haute horlogerie craftsmanship. Rhodium-plated bridges feature straight Côtes de Genève engraving, diamond-beveled edges, and mirror-polished screw heads. The mainplate incorporates refined sandblasted textures with “SILICIUM ESCAPEMENT” inscriptions, while hidden surfaces receive circular graining treatment.
The skeletonized 18K gold oscillating mass displays polished arrow-shaped motifs paying tribute to the original 1867 bridges, complemented by combinations of sandblasting, snailing, and traits tirés finishes. Additional elements including sunray-finished clutch components and circular satin-finished wheels underscore the blend of innovation and heritage.
The modular design allows potential integration of additional complications, positioning the GP4800 as a platform for future developments while immediately demonstrating Girard-Perregaux’s continued commitment to in-house movement development and manufacturing excellence.
Available through Girard-Perregaux authorized dealers worldwide.
