IWC astronomical 18k yellow gold gents wristwatch Da Vinci with perpetual calendar & chronograph, Switzerland 1990`s, reference 3750, self winding, snap on case back, case with mobile lugs, original leather strap with original 18k yellow gold buckle, screwed down winding crown, enamel colored dial with raised gilded indexes, display of hours, minutes, constant second, day, date, moon phase, year & chronograph, gold-plated movement calibre 79261, 39 jewels, 5 adjustments, precision adjustment, diameter approx. 39 mm, original box, blank papers & additional calender module, calendar has to be adjusted, otherwise condition 2