Audemars Piguet Expands Perpetual Calendar in order to 38mm for the First Time and Presents Three Vibrant Gemstone Knobs       There's much to signify in its 150th anniversary. Audemars Piguet CODE 11: 59 Flying Tourbillon replica   Audemars Piguet has introduced three brand new perpetual calendar models in the Royal Oak and Code 11. 59 collections,...