IWC Da Vinci rare 18k white gold astronomical gents wristwatch with perpetual calendar and chronograph reference 3750-006, Switzerland sold according to warranty card 1999, self winding, solid case with mobile lugs, snap on case back, screwed down winding crown, original leather strap with original 18k whitegold buckle, white dial with raised silvered hour-indexes, silvered hands, complete calendar-display, gold-plated movement calibre 79261, 39 jewels, 5 adjustments, original box, papers & description enclosed, diameter approx. 39 mm, condition 2