The Jacqueline Kennedy Onassis Cartier Tank watch just sold for $379,500 USD —including buyer's premium— at the Christie's Rare Watches and American Icons Sale in New York City today June 21st, 2017.  A portion of the proceeds of the sale of this Cartier watch and her “50 Mile Hike” painting will be donated to the National Endowment for the Arts. While this watch not only comes with significant provenance and rich history, Jackie O's Cartier Tank also has an interesting story behind.