Realized by using a serial "Pendulette" from Jaeger-leCoultre. Based on parts from calibre IWC 9520. "Flying" carriage made from polished steel on ball bearing. "Flying" pallet fork and escape wheel. Monometal balance with Breguet-overcoil. "Unusual" frequence, one 360°-turn in 50 seconds. 2 days power reserve. Rhodiated case with crystals.