IWC Watch Ingenieur Automatic 35 IW324906. The Ingenieur Automatic 35 complements IWC Schaffhausen’s Ingenieur collection with a version with a case size of 35 millimetres. The modern Ingenieur revisits the bold aesthetic codes of the Ingenieur SL, Reference 1832, a luxury sports watch created by renowned Geneva watch designer Gérald Genta in the 1970s. This model features a stainless steel case and integrated stainless steel bracelet, a black dial, and rhodium-plated hands and appliques. Designers and engineers worked hand-in-hand to define, proportion and finish every part and characteristic of the Ingenieur faithfully to a 35-millimeter case size