IWC · Manual Wind

81905

A hand-wound calibre built for the Portugieser Hand-Wound Tourbillon, carrying a one-minute flying tourbillon supported from below rather than bridged over the top. The carriage runs to 56 parts and weighs 0.635 grams. Pallet lever and escape wheel are silicon, coated with IWC's Diamond Shell to cut friction, and the tourbillon can be stopped to set the watch exactly.