The Gerald Genta-designed stainless steel blue dial Patek Philippe Nautilus Ref 5711 is an icon. A Grail Watch. And now, it’s DOA. Discontinued. Gone. Although rumors about its demise have been circulating for weeks, the news still comes as a shock. Why would one of the world’s best watchmakers, the ranking member of the watch industry’s Holy Trinity, kill its most iconic model on a Friday news dump? (FYI, Robb Report, it’s spelled Nautilus, not Nautlius.) We can only guess what triggered the move . . .