IWC Ingenieur SL 3506.1

IWC gents wristwatch Ingenieur SL in steel/gold on stainless steel bracelet reference 3506.1, Switzerland around 1990, self winding, satin-finished case, screwed down case back and winding crown, gold-plated antimagnetic inner case, white dial in millimeter papers design with applied hour- signs date at 3, gilded original hands, gold- plated movement calibre 37521, 21 jewels, precision adjustment, rotor with 21 ct gold segment, diameter approx. 34 mm, length approx. 18,5 cm, condition 2, property of a collector