IWC rare 18k pink gold gents wristwatch so called 'small Portuguese' reference 3531, self winding, Switzerland around 1995, 3-piece construction case on both sides glazed, snap on case back and bezel, neutral leather strap with original 18k pink gold buckle, silvered dial with Arabic numerals, central rotor with segment in 21 ct gold, 36 jewels, calibre 891/2, 5 times adjusted, movement with stripe- & circular graining, blued screws, diameter approx. 35 mm, signs of use revised, condition 2-3, aus, neutral box enclosed, property of a collector