very fine Glashuette model of escapement Flying Tourbillon according to Alfred Helwig spring-chronometer-escapement locking-jewel, trigger-jewel and lifting-jewel with Ruby balance and escape wheel with Ruby- bearing-jewel Engraving on the ground-plate: karrusel Chronometer Diameter of base: approx. 21,5cm Diameter of gound-plate: approx. 10,5cm Total High: approx. 13cm