IWC, "Ingenieur", Ref.666AD, Cal. 8531 powered , silver dial, circa mid 1960s.
An IWC masterpiece model that has been in production from 1955 to the present day. It boasts of the top class practicality among the International models of that time, such as anti-magnetic resistance by the double case structure using soft iron and water resistance by the screw back, and the simple and an untiring dial design is a model that can be used for a long time. The calendar laid out in the center of the dial gives the Ref.666 a unique look, and the silver dial, which is evenly textured and aged, is a gem with a wonderful vintage taste.