IWC Ingenieur Automatic SL Khanjar Dial ref 3505 Steel and Gold Execution bulang-and-sons The opaline dial

The opaline dial

- Serial 502xxxx dating to 1976

as is the dial

and Rolex box

the lock incl

IWC Ingenieur Automatic SL Khanjar Dial ref 3505 Steel and Gold Execution bulang-and-sons The opaline dialThe IWC Ingenieur has always been a watch shaped by its time. Originally conceived by IWCs technical director, Albert Pellaton, the Ingenieur was developed as a response to the growing presence of electronics. Its soft iron inner cageessentially a Faraday cageprotected the movement from magnetism, while the efficient Pellaton winding system ensured reliability. A true technical watch, created with purpose. By the 1970s, the watch world was changing.