One of Patek Philippes most iconic and historically important watches, the 570 was the first large Calatrava the brand made when it was released in 1938. The proportions of the 570 are identical to the reference 96 but in a 35mm case instead of 30.5mm. The 570 was produced from 1938 until 1972. This example remains in incredible original condition with a wonderful rich patina and clear, deep hallmark from years of avoiding a polishing wheel.