Patek Philippe Calatrava Blue Dial in 18k White Gold with Original Guarantee Paper Ref. 3445/6For occasions that call for the epitome of elegance and craftsmanship, the Patek Philippe Calatrava stands above the rest. Introduced in 1932, the Calatrava set the standard for dress watches, named after the Calatrava crossa symbol of the Spanish Military Order and Patek Philippe's emblem. The ref. 3445 breaks away from the traditional time only manual wound design, featuring automatic winding and a waterproof screw down case. Crafted in 18k white