IWC Ingenieur: The anti-magnetic watch for scientists
Ingenious Inventions: Taking a Close-Up Look at the IWC Ingenieur Classic | WatchTime - USA's No.1 Watch Magazine
Lot-Art | IWC INGENIEUR, DOUBLE SWISS, STEEL International Watch Co., Schaffhausen, "Ingenieur," No. 1494712, case No. 1469038, Ref. 666A. Made circa 1955. Fine and rare, water-resistant, center seconds, antimagnetic, self-winding with "Pellaton"