Patek Philippe opened their first U.S. boutique five years ago inside Tiffany & Co. on Fifth Avenue in New York. Patek Philippe has created a special edition 5396G annual calendar to commemorate the five year anniversary. The 5396G is 18K white gold with a black dial. The dial is double signed with Patek Philippe and Tiffany & Co. The case back is engraved with “Patek Philippe – A Shared Vision – 2008-2013 – Tiffany & Co.”

http://www.hodinkee.com/blog/introducing-the-patek-philippe-ref-5396g-made-exclusively-for-tiffany-co