Dial case and movement signed. DIAM. 40 mm. THICKNESS 12 mm. Approx overall length 195 mm.plus 2 links. The IWC Ingenieur SL Automatic was produced in less than 600 examples between 1976-1984. Examples entirely cased in 18K yellow gold such as the present lot were only produced for two years making them amongst the most sought after watches from the Ingenieur family.