Patek Philippe Ellipse 3634 White Gold Step Case with Onyx DialThe collector community has for a long time been fascinated with hard stone dials and more recently with the Patel Philippe Ellipse. Combine both areas of interest and you have a pretty interesting watch indeed. The Ellipse 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 hard stone dials, such as this incredible example with an onyx dial. The