IWC Ingenieur Automatic 40 The collection includes three stainless steel models and one titanium model. The Ingenieur Automatic 40 is powered by the IWC-manufactured caliber 32111 with automatic pawl winding and a 120-hour power reserve. Adhering to the tradition of engineers, the soft iron inner case can effectively protect the movement from the influence of magnetic fields on its precision. In addition, the case is water-resistant to 10 bar, making the Ingenieur Automatic 40 a modern and functional sports watch.
The case is a modified 45.7mm lug-to-lug with a functional screw-down bezel.
My favorite version is the Aqua, Ref. IW328903: stainless steel case, aqua blue dial, rhodium-plated hands and applied hour-markers, one-piece stainless steel bracelet with polished center link and butterfly folding clasp.