Introduced in 2016, the 905.JX.0001.RT is Hublot’s sapphire-cased version of the MP5 LaFerrari. It is powered by caliber HUB9005.H1.PN.1, a variation of the HUB9005 designed to enhance the see-through effect. The sapphire-crystal case is said to require 600 hours of machining; it weights some 53.5 grams.
