Notes: The IWC Ingenieur Jumbo 3303 is a very elusive reference, with only 149 pieces having ever been produced. Differently from the more common 1832 automatic model, reference 3303 features a broader bezel and a flatter case (8.7mm vs 12.5mm).The Jumbo Ingenieur is of course part of three most iconic timepieces designed by Gérald Genta, along with the Audemars Piguet Royal Oak and the Patek Philippe Nautilus. The full set of original accessories of the present watch adds another layer of collectibility to the piece.