Nicolas,
congratulations for your beautiful RO Jumbo. To me the early Jumbos are absolutely incredible due to their "two-dimensionalness". Large diameter and lack of height give a unique wearing experience. I also prefer them to the PP Nautilus because they have more interesting details like the hobnail dial, the multi-link bracelet or the screwset bezel.
The only major drawback are service cost and turnaround time...