For the firm’s new Heritage collection, a limited edition of the Tourbillon Double Peripheral has been introduced, with a more elaborate dial treatment with an engraving of a view of Lucerne, home of Carl F. Bucherer, on the movement. The peripheral winding system is a variation on a standard automatic winding system: an oscillating weight, set in motion by the arm movements of the wearer, winds the mainspring and keeps the watch running. In a conventional automatic winding system, the rotor tends to obscure the view of the movement itself.
Carl F. Butcherer’s modern production of Tourbillons took an interesting approach with both a peripheral rotor, and a carriage driven at its periphery, which seems to be floating inside the movement with no mechanical coupling to the rest of the watch
There have been very few attempts to make a Peripheral winding system work; Patek Philippe filed patents in the mid-1960s, but no one used this peripheral winding automatic movements until 2008 when Carl F. Bucherer launched the CFB A1000 Caliber. This smart and elegant solution allows for winding efficiency while still providing a clear view of the movement as well as reducing overall thickness.