this is an early and rare iwc ingenieur reference 3505 sl from the 1980s with white „millimeter-pattern-dial“. the antimagnetic watch, with it´s 34mm steelcase was the very first version of the midsize ingenieur after the release of the iconic 1832 jumbo. it appears to be in unpolished condition with some signs of wearing and 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 pattern. it´s iwc automatic caliber 375 is running strong and exact. the watch will fit wrists up to a circumference of 17,8 cm or smaller.