Since its debut in 2009, Hublot‘s in-house Unico caliber, a column-wheel flyback chronograph movement, has been used in various models in the brand’s King Power collection. A few years ago, Hublot introduced the first Big Bang watch equipped with the Unico.
The Hublot Big Bang Unico has a 45.5-mm-diameter case, in either titanium or Hublot’s proprietary “King Gold”, highlighted by a bezel in either satin-finished black ceramic or in titanium or King Gold to match the case material. The bezel is secured by six H-shaped screws with an updated design: the head of each screw is now in relief, allowing the application of alternating polished and matte finishes. The screw-down crown, made of overmoulded rubber, was also redesigned, now bearing the “H” motif from Hublot’s distinctive screw on the end.
Another first for the Hublot Big Bang, which made its debut in 2005, are the round push-buttons for the chronograph. Each one is protected by a push-button guard integrated in the middle and finished like an engine piston. The case’s strap attachment has been upgraded with Hublot’s “One click” system, which allows the wearer to switch straps easily. The strap of each Big Bang Unico watch is made of structured, ribbed natural rubber — another new feature — which perfectly matches the endpieces of the case middle. The dial is skeletonized to show off the Unico movement and features hour indices and Arabic numerals, redesigned to give them more volume and hollowed out and filled with Super-LumiNova. The two subdials — a chronograph minutes counter at 3 o’clock and small seconds at 9 o’clock — are circled by polished rings, and the date is displayed in a white window at 3 o’clock. The hands have also been reworked, faceted on two levels and filled with Super-LumiNova.
The Unico — Hublot’s first manufacture movement — has a flyback chronograph function that can be reset at any time, and has its most distinctive features an unconventionally positioned mechanism with dual coupling and a column wheel that is visible on the dial side. Other notable features include an hour counter driven directly by the barrel and the lack of a jumper in the chronograph mechanism. The Unico’s pallet fork and escapement wheel are fixed to a removable platform and are made from lightweight silicon.Hublot emphasized simplicity and robustness in the Unico’s construction: it’s made of just 330 components and has been continually adjusted since its debut in 2009. It has a fast frequency of 4hz (28,800 vph) and a power reserve of approximately 72 hours.
Top to bottom: the Hublot Big Ban Unico Titanium Ceramic (21,700), Big Bang Unico Titanium ($20,600), Big Bang Unico King Gold Ceramic ($40,100), Big Bang Unico King Gold ($43,600).
To learn more about Hublot’s Unico movement, click here for our review of the Hublot King Power Unico All Black.
This article was originally published on June 28, 2013, and has been updated.