The Big Bang Unico Sapphire Replica is an almost completely transparent watch, with most of the case machined from clear sapphire crystal, with a few components in titanium and clear resin.
Sapphire crystal as used in watchmaking is synthetic, being grown in a laboratory, but has the same properties as natural sapphire.
While the bezel, case middle and back are made of clear sapphire, the screws, crown, pushers and other metal parts in the case are made of titanium. The Hublot Big Bang Unico Sapphire Replica bezel insert that sits between the bezel and case middle, as well as the dial and hands, are made of clear resin. Even the strap is a translucent silicone.
The Hublot Replica HUB 1242 Unico movement can be seen from both front and back, with the column wheel for the chronograph visible at six o’clock on the dial. The Unico is Hublot’s workhorse in-house movement that is the base for several complications, including the chronograph found here.
The case diameter is 45 mm, identical to the standard Hublot Big Bang Replica, and it is rated to 50 m.