The Hublot Big Bang Unico Sapphire Rainbow is a limited edition of 50 pieces introduced in 2017. It features a case made of polished sapphire, with titanium screws, pushers, and crown. The bezel is white gold, and set with 48 baguette-cut sapphires, rubies, topazes and tsavorites. It is powered by the self-winding caliber HUB1242 flyback chronograph movement.
