A rare and highly compelling example of the Patek Philippe Calatrava, reference 570, crafted in white gold and distinguished by its bold, thick lugs and snap-back case. With a diameter of 36 mm, the watch was considered oversized for its era, anticipating modern proportions while retaining classical elegance. Originally sold on April 23, 1956, this example features its confirmed silver dial with central seconds, dauphine hands, applied gold indexes, and pearled minute track. Powered by the celebrated manual-winding caliber 27SC, it represents a superb synthesis of technical excellence, restrained design, and historical significance. Offered with its archive extract, this watch stands as a refined and authoritative expression of mid-20th-century Patek Philippe watchmaking.