Two Ingenieur Watches from IWC Schaffhausen featured in Red Gold

Ingenieur Constant-Force Tourbillon (Ref. IW590002) and the Ingenieur Perpetual Calendar Digital Date-Month (Ref. IW379203) from IWC Schaffhausen. The two powerful watches which were first introduced in 2013 are now also available in an 18-carat red gold case. The patented constant-force mechanism of the Ingenieur Constant-Force Tourbillon is integrated in the tourbillon and guarantees an extremely precise rate. Two barrels supply the higher torque required to drive the constant-force tourbillon and also supply the energy needed for the moon phase module. The Ingenieur Perpetual Calendar Digital Date-Month features a perpetual calendar together with a digital date display and leap year indicator. Every night, when the date display advances, the integrated IWC quick-action switch siphons off a little of the energy, stores it and then discharges it precisely at the end of the month.