This is a very rare model of the IWC reference 5251 Portofino Moonphase. It is unclear if this watch was called the “Portofino” or if it was only referred to by the reference number “5251”. The story is told that in 1981 Kurt Klauss of IWC decided to take his legendary pocket watch movement cal. 9521 and convert it to a wrist watch. He put the watch into production later that year and by 1987 it became the first of the Portofino line we know today. It is said that only 350 pieces were made, some examples had a solid back and some had an exhibition back.
The IWC 5251 is a very delicate 46mm wristwatch with relatively thin snap back case and nicely curved, graceful, hallmarked lugs. The stark matte-enameled dial features thin Roman numerals, tracking, hands and has bold seconds & moon-phase apertures. Comes on brown strap in worn but very good condition along with IWC Plaque Buckle.
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