IWC Ingenieur SL 3506 "Graph Paper" Dial

Key Points from the Discussion

• The IWC Ingenieur SL ref. 3506, with its distinctive 'graph paper' dial, is a later iteration following the iconic Jumbo ref. 1832, which debuted in 1976. The dial design is considered perfectly suited for the Ingenieur's technical aesthetic.
• A fellow collector confirms the robust internal condition of the ref. 3506, noting that a recently serviced example required only cleaning and oiling of the movement, indicating its durable construction.
• Another collector shares their IWC Ingenieur, referring to it as a 'cousin' to quattro's 3506, showcasing the broader family of Ingenieur models and their shared design language.