IWC Ingenieur SL Jumbo Quartz Black Dial Ref. 3303The IWC Ingenieur was first introduced in 1954 as a tool watch specifically designed for engineers and technicians who needed a timepiece that could withstand magnetic fields and harsh environments. The original model featured a soft iron inner case to protect the movement from magnetic interference. Over the years, while the design has evolved, the Ingenieur has always remained true to its original purpose: a rugged, reliable timepiece built for