18k Yellow Gold Patek Philippe Ref 5100..Comes 100% Factory New & complete with boxes,books & certificate of origin.Everything is 100% factory complete as it was produced and delivered from the factory. This particular model was produced in a limited production of 1500 pieces and is sure to steadily rise in value over the years ahead..Our experts believe this piece to be one of the most significant models produced by the world's leading maker, Patek Philippe, in this century with it's unique 240 hour power reserve complication...If you're in the market today for one of the most unique & complicated Patek Philippe watches ever produced, then search no further. When it comes to the best of the best in rare Patek Philippe timepieces Astorlive is your source.