Richard Mille RM 75-01 Flying Tourbillon Sapphire Watch

Many Richard Mille watches feature skeletonized movements. Few put them on display like the RM 75-01 Flying Tourbillon Sapphire. As the name suggests, its tripartite case is made completely from sapphire — either clear, blue, or pink — and takes over 1,000 hours to manufacture. It's powered by a calibre RM75-01 manually-winding two-hand movement that features a flying tourbillon, a flying barrel, and a baseplate and bridges made from grade 5 titanium and given either 5N gold or grey PVD treatment. Fitted with rubber straps, the model is limited to ten examples in blue or pink and 15 in clear sapphire.