The Patek Philippe Calatrava ref. 3820 is one of the most iconic 'time only' watches out there and simply one of the best dress watches any one can have. The Patek ref. 3820 featuring applied Breguet numerals is even more special and a watch reserved for those wanting the best. The first Patek Philippe Calatrava was released in 1932 as ref. 96 and since then, its been one of the most iconic and classic watches from Patek with very little changes and always true to the essence of the brand.