IWC Portugieser Ref IW503501 a stainless steel Annual calendar wrist watch with day, date and 7-Day power reserve circa 2016. Dial: silvered, Arabic numerals, power reserve indicator sub-dial at 3 o'clock, three windows for date. Calibre: cal. 52850 automatic winding, 36 jewels. Case: brushed and polished, glazed display back secured by six screws. Case number: 3988536. Closure: IWC black leather strap and folding clasp. Dimensions: 44 mm diameter. Accessories: IWC international warranty card dated 23 April 2016, operating instructions and warranty/service booklets and presentation box.