Article on https://www.hodinkee.com/articles/a-collectors-guide-to-the-patek-philippe-nautilus-5711.
``Starting in 2011, Patek started low-key producing the 5711/1P for its most established clients, the "P" standing for platinum. Not something you'd find in a catalog, it was only offered to the world-conquering types, the CEOs, rockstars, or just the most prolific Patek collectors you've never heard of. A chonk of a watch, the platinum case and bracelet weighed in at 260 grams.
There are various estimates of actual production, but he is certain it's less than 100 pieces. He points to the Tiffany-signed 5711/1P specifically as a watch that "should be worth millions." He knows of three in total. Three.
" – no one can dispute that, among 5711s, the non-anniversary platinum is among the rarest.