IWC - International Watch Co. Schaffhausen - “Ingénieur”

European Watch Clock and Jewellery Fair 1976 BF 210
Problem-free to 80,000 amperes. This new “Ingénieur” design by IWC
is for anyone (physicists, doctors, engineers) who is often exposed to
strong magnetic fields. A specially unmagnetisable case is elastically
connected to the outer case, itself water-resistant to a depth of 120 rn.
Increased shock protection, screwed-in crown, sapphire crystal, white
gold watch hands, all-steel large-link bracelet : a perfect match of
styling and technology. (IWC - International Watch Co. Schaffhausen - “Ingénieur”)