What it is
The Unico is the modern Hublot in-house chronograph, designed and built at the Hublot manufacture in Nyon on the south shore of Lake Geneva. The HUB1240 launched in 2010 with the Big Bang Unico; the HUB1242 is the 2018 second-generation update with reduced thickness and improved bidirectional rotor; the HUB1280 is the version used in the Spirit of Big Bang. All share the same architectural concept: column-wheel switching, double horizontal clutch, flyback reset-while-running, and the unusual choice to mount the chronograph mechanism on the dial side of the movement.
Why dial-side chronograph mechanism
In a conventional chronograph the chrono mechanism sits on the back of the movement, hidden behind the case-back; the dial side shows only the hands and sub-dials. Hublot inverted this for the Unico: the column wheel and clutch sit on the dial side, fully visible through the open-worked Big Bang Unico dial. From a function standpoint this changes nothing; from a brand standpoint it transforms the chronograph mechanism into part of the watch's aesthetic identity. The Big Bang Unico's "ticking column wheel visible at 6 o'clock" is a Hublot signature you cannot get from a Valjoux 7750 or even a Breitling B01.
Architecture
Column wheel: the premium way to switch chronograph function (smoother pusher feel than the Valjoux-style cam). Double horizontal clutch: rather than a single coupling wheel between the seconds train and the chronograph train, the Unico uses two coupling wheels engaged in tandem, reducing tooth-on-tooth jitter at start. (This is different from the more common vertical clutch used by the Rolex 4131, Omega 9300, and Breitling B01.) Flyback: a single press of the reset pusher zeroes and immediately restarts the chrono, useful for sequential timing. 72 h reserve: matching the modern industrial benchmark. Bidirectional rotor: winds both ways for efficient self-winding.
The variants in the family
The Unico architecture spawns several specific calibers. HUB1240: the original 2010 caliber, in early Big Bang Unico references. HUB1242: 2018 update, thinner (8 mm vs 8.05 mm), refined bidirectional rotor, refined finishing, in current Big Bang Unico. HUB1280: variant for the Spirit of Big Bang (the tonneau case). HUB1280.UN: in some Classic Fusion Aerofusion. The architecture is also used as the base for Hublot's more complex calibers: HUB6035 tourbillon-chronograph, HUB6004 minute repeater. The Unico is the foundation of the Hublot in-house movement strategy.
Pricing context
A modern Big Bang Unico with the HUB1242 starts around USD 22,000-25,000 in titanium, USD 30,000+ in ceramic, USD 40,000+ in King Gold. For comparison, an Audemars Piguet Royal Oak Chronograph (Cal. 4401) is USD 40,000+; a Rolex Daytona (Cal. 4131) is USD 16,000 retail (USD 35,000+ grey); a TAG Heuer Carrera Heuer 02 is around USD 6,000. The Unico sits between the mass-luxury sport chronographs (Daytona, Speedmaster) and the haute-horlogerie sport chronographs (AP, Patek), with Hublot's aggressive design vocabulary as the differentiator.
Service notes
Service for an Unico runs USD 1,800-2,500 at Hublot, with a 2-year warranty. Recommended interval: 5-7 years. Independent service is rare; the dial-side chronograph mechanism, the bespoke clutch, and the brand-restricted parts make Hublot service a closed channel for now. Hublot service operates from Nyon with regional service centres; turnaround is typically 6-10 weeks. The watch returns regulated to within -4/+6 sec/day across positions.
