IWC Ingenieur SL Automatic Ref 3506 Grey "Graph Paper Dial" 1951 The case and bezel are

The case and bezel are in great and strong all-round condition

- Burgundy deep pie-pan dial

079 dating to 1971- 40x36mm 18ky yellow gold case- Grey dial with date and Italian language day- Cal 752 automatic movement- Serial mvmt 3079xxxx- Comes with Omega archive extract- Integrated one-piece bracelet- Fully serviced by our watchmaker- One-year mechanical warranty- Includes a handmade leather watch pouch- Free worldwide Fedex Priority shipping

the same time most watch companies switched from radium to tritium luminescent material

Do not miss out on this rare sleeper watch

IWC Ingenieur SL Automatic Ref 3506 Grey "Graph Paper Dial" 1951 The case and bezel areIn the mid 1970s, IWC decided to redesign the Ingenieur to give it a more "fashion forward" look. With this new model, IWC aimed to emulate the success of one of its rivals. A few years earlier, Audemars Piguet had struck gold with the luxury steel sports watch, the "Royal Oak," designed by Grald Genta. In response, IWC brought Genta on board (who also designed the steel Patek Philippe Nautilus) to redesign the Ingenieur, along with two other models: