Case material: Platinum; Charge: Manual; Conditions: Excellent Presentation condition : With dealer guarantee ; Price on request Gmtbroker Reference: AC.8050.20.M1020 Super Exclusive& Extremely Rare ONCE AGAIN THE FABULOUS & RICH DESIGN OF DEWITT'S TIMEPIECES The Tourbillon Force Constante à Chaîne most definitely belongs to the exclusive circle of highly complicated masterpieces. A success story with a bright future, as DeWitt introduces in 2010 a most pleasant and eye-catching declination, combining Platinum with DeWitt’s emblematic Black-color. This creation releases a truly warm and reassuring ambiance; the perfect atmosphere to peacefully observe the mechanical wonders of this work of art. DeWitt's solution involves inserting an additional mechanism into a traditionalmechanical movement in order to exchange a motive power, which may be variable or irregular (effort of gear-train or barrel-spring), for another, perfectly constant force – whatever the degree of winding of the barrel. In other words, the device is designed to transmit impulses whose energy remains identical and regular, however taut the barrel-spring, thanks to three additional wheels: one to ensure correct gear operation; and two intermediate wheels between the motive force (barrel) and the regulator (Tourbillon). This solution absorbs the force generated by the barrel once every second, andredistributes it to the Tourbillon every 10 seconds. To see how the system operates, watch the elegant inertia weight of the constant force device (in the shape of a cross with