This is a rare midsize IWC Ingenieur 3506 from the early 1980s with sought after black „millimeter-paper-dial“. The 34mm Gerald Genta designed Ingenieur „SL“ has never been polished before and all parts about it are the original ones. It´s dial and handset with all the original Tritium appears in flawless condition. The IWC automatic caliber 3753 is running strong and exact and has recently received a service by our watchmaker. The Ingenieur will fit wrists up to a circumference of 17,8 cm or smaller.