This is a 1980s IWC Ingenieur 3506 sl with beautiful grey „millimeter-pattern-dial“ The Gerald Genta designed Ingenieur, with it´s 34mm steelcase was the first version of the midsize Ingenieur after the release of the iconic 1832 Jumbo, and up today the only example that writes SL on the dial. it appears to be in sharp condition with all parts like crown, glas and bracelet being the original ones. The serialnumber on it´s caseback is clearly readable. the golden indicies and handset with beautifully toned tritium looks just awesome on that grey dial with small squares texture. the saphire-glas has a little scratch over 7 o´clock. It´s IWC automatic caliber 3753 has recently received a service from our watchmaker. The watch will fit wrists up to a circumference of 17,8 cm or smaller.