Speaking of Ref.5016, it is a tourbillon + minute repeater + perpetual calendar, and it is the ultimate model that can be called Holy Grail for general Patek lovers. Sotheby's has a custom 5016 with date lettering and two red hands. The case is WG made in 2012. Estimate is 5.5-9.5M HKD.

Cf :​ ​Sotheby's

Speaking of red of 5016, there is also a famous individual platinum made in 2005, but this timepiece has less red part and is moderately plain, so how would you evaluate it? However, the WG case may be weak as a custom-made item. Of course, it's still one watch in the world.

 

 

 

This is the 2005 most famous red accent 5016P. The case is platinum, which gives it a much more flashy impression than this watch. The index on the outer circumference is also red, but even the PATEK PHILIPPE logo is red.