One of the rarest and most sough-after modern Patek's ever made, the solid white gold ref. 5131 World-Time with precious cloisonné enamel dial... World-Time's from 1950 achieve well in excess of $1,000,000, and the scarcity and demand for these beautiful enamel dial models (no longer produced by Patek) have made them important investments that are being snapped up by hedge-funds as much as collectors. In pristine condition, and complete with its original Patek Philippe box, World-Time instruction booklet & stamped Certificate of Origin.