Hublot “Cathedral” Minute Repeater Tourbillon and Column Wheel Chronograph

This year, Swiss luxury watch maker Hublot is presenting a world first, with a minute repeater watch featuring two “cathedral” type gongs, a tourbillon and column wheel chronograph, with carbon fiber bridges, in a case made from carbon fiber. This is a perfect illustration of “Fusion” between great watchmaking tradition and the technology of the future.
It is a timepiece with a sophisticated mechanism, featuring three major Haute Horlogerie complications particularly prized by connoisseurs and collectors, but revisited in a resolutely contemporary spirit: The main particularity lies in the fact that the three complications are visible from the dial side.
Besides the carbon fibre, the case is also fashioned with materials such as titanium and rubber, which is a perfect illustration of the Art of Fusion key to Hublot. From a design point of view, the minute repeater bolt is ingeniously integrated into the King Power case middle, just like the chronograph control push-piece subtly integrated into the watch’s crown. The minute repeater, activated by means of a lever situated between 8 and 10 o’clock, sounds the hours, quarter-hours and minutes. Its two “cathedral” gongs (one for hours and the other for minutes) are double the length of a regular gong. The whole design aims for a very uncomplicated overall effect for a piece of this level.

The manual-winding mechanical movement boasts a 5-day power reserve. The hour and minute indicator is situated centrally, for a conventional readout. The flying tourbillon – with suspended cage – is situated at 6 o’clock, and features an unusual structure of very high quality: indeed, the cage rotates without a ball bearing, and has a Swiss lever escapement.

Technical details
Reference 704.QX.1137.GR

Case
“King Power” – Diameter 48 mm in matt carbon fiber
Bezel: 6 H-shaped titanium screws, countersunk, polished & locked
Crystal: Sapphire with interior anti-reflective treatment
Lateral inserts: Black composite resin
Case-back: Matt carbon fiber
Crown: Black PVD titanium
Screws: Titanium

Dial
Matt black with satin-finished black nickel appliques and silvered
White and red powder transfers
Hands: Faceted, satin-finished and micro-blasted, black nickel, skeleton
Screws: Polished and bevelled heads, rounded and polished ends

Wristlet
Black alligator gummy, stitched onto black rubber inner
Clasp: Ceramic and black PVD deployant buckle

Functions
– Hour, minute and seconds via the cage
– Minute repeater
– Cathedral chime gong
– Single push-piece chronograph at 3 o’clock (60-sec. and 30-min. counter)

Movement
– HUB 8100 Flying tourbillon without ball bearing
– Dimensions: Diameter: 30 mm, Thickness: 9.47 mm (Diameter of chime gongs: 32.60 mm)
– Manual winding
– 2-position stem Manual winding and time-setting
– No. of Components: 404
– Jewels: 37
– Hairspring: Flat, for extreme position setting
– Frequency: 21,600 Vib/hour (3 Hz)
– Power Reserve: Approximately 120 hours
– Oscillator: Hublot Balance with adjustment inertia-blocks
– Shock absorbers: Shock absorption for main plate and balance bridge
– Main plate: Brass, bevelled with drawn rims, and circular-grained recesses,Black ruthenium coating
– Bridges: Carbon fiber, brass, bevelled with drawn rims & circular-grained recesses, Black nickel coating
– Gear train: Circular-grained&bevelled wheels, coating: black ruthenium, rolled pinions

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