Nautilus « Steel Index »
Serial /movement 1,30x,xxx/5.41x.xxx (1977).
Extract of the archives from august 2016 + Patek service paper from january 2016.
Flawless blue dial. This rare version has STEEL applied index estimated at only 10% of the 3500 first series of Nautilus produced. This is quite remarquable given that an active promotion of Gold was going on at the time (70s) through the APRIOR association. This effort is even obvious on this very dial with the SIGMA letters at 6 o’clock: σ SWISS σ.
Sharp case and thick bezel.
Thin bracelet with 18 links.