IWC_INGENIEUR PERPETUAL CALENDAR DIGITAL DATE-MONTH

HANDOUT - The Ingenieur Perpetual Calendar Digital Date-Month (Ref. 3792) 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. (PHOTOPRESS/IWC)