Patek Philippe Nautilus 5980/1A Steel Blue Dial, Automatic Chronograph Movement, it comes in a modest 40.5mm, from 2011, box & papers included. The Patek Philippe Nautilus 5980/1A-001 is an exceptional piece that combines the sporty elegance of the Nautilus collection with the robustness and practicality of stainless steel. Introduced in 2006, this model is celebrated for its integrated chronograph function and sophisticated design.