Patek Philippe Ellipse 3634 White Gold Step Case with Onyx DialWhite gold steps to deep pool of black The Ellispe DOr reference 3634 is a large size Ellipse measuring 38x33. 5mm and features a very unusual three step case. These watches were sometimes fitted with rare hardstone dials, such as this incredible example with an onxy dial. The dial is clean with no hour markers and very clean white gold coloured no lume hands. The watch is powered by the legendary automatic calibre 28. 255, the same movement as the