IWC Ingenieur
A self-winding watch for engineers and technicians, protected against magnetic fields.
The Ingenieur came out in 1955 for those who worked in electrical surroundings. In 1976 Gérald Genta designed a new version with an integrated bracelet, related to his Royal Oak and Nautilus.
Materials: Steel or gold, soft iron; self-winding movement
Manufacture: Made in Schaffhausen; winding is by IWC's own Pellaton mechanism.
The lightning symbol and the name Ingenieur on the dial.
On the 1976 model, the bezel with five recessed screw holes.