IWC Ingenieur reference 666 with papers in nearly unworn condition. This early Ingenieur model stands out for its exceptionally original, unpolished state and embodies the functional clarity of the first generation. As one of the earliest references of the Ingenieur line, the ref. 666 reflects IWC Schaffhausen’s focus on anti-magnetic precision watches designed for professional use. Preserved in this condition and accompanied by papers, it represents a rare opportunity for discerning collectors.