Sony managed to sell more than 500 million PlayStation consoles since the launch of the PSOne in 1994, and, to celebrate this monumental achievement, it is launching a special Limited Edition PS4 Pro that comes with a dark blue translucent casing, a 2 TB HDD, a PS Camera, and a translucent controller. The console itself has bronze-gold insignia and a special plaque that lets the owner know which of the 50,000 units is in his possession.
https://www.notebookcheck.net/Sony-celebrates-500-million-PlayStation-units-sold-with-PS4-Pro-Limited-Edition.321378.0.html