The Hublot Big Bang Unico was introduced in 2013 as the next step in the evolution of the Big Bang - and Hublot. This Big Bang is driven by a 'Unico' movement, a self-winding caliber with chronograph and date that boasts a couple of clever solutions.Ref. 411.OX.1180.RX.1104 has a red gold ('King Gold' case and a diamond-set bezel.