A perfect and very rare explorer I ref 6610 from 1958 with it's uber rare original dial chapter ring gilt and OCC only. Very rare reference of explorer I following the 6350 and 6150 ... The peculiarity of this watch is its original gilt chapter ring dial with a beautiful pumpkin patina and hands that match the patina. Indeed it is the very first dials of the 50's OCC ( officially certified chronometer) with its beautiful original lacquer. A piece that we only see very rarely in this quality on the market. A beautiful piece that can complete any serious collection.