IWC - International Watch Co., Schaffhausen Ingenieur SL et SL Quartz

European Watch Clock and Jewellery Fair 1980 BF 358
“Technical” styling does not in any way preclude handsome good looks : witness IWC’s Ingenieur SL and SL Quartz models. Protected against magnetic influences to 500 Oersted (40,000 ampere/m), both are also water-resistant to a depth of 120 m and fitted with a special shock-protection system. All steel, 14K gold-and-steel or 18K gold cases. Very thin quartz movement, scratch-resistant and glareproof mineral crystal. (IWC - International Watch Co., Schaffhausen Ingenieur SL et SL Quartz)