Most watches have a sapphire crystal, and some have a sapphire back. The Big Bang Unico Sapphire has both, but its bezel and case are also made of sapphire, giving it a transparent look without sacrificing durability. The price? $57,900.
Hublot’s precision timepiece is a miniaturized tribute to the Antikythera Mechanism, an ancient, but complex astronomical computer. An intricate watch, with 295 components driving time, solar and lunar calendars.