Gérald Genta Octo 48-Month Perpetual Calendar Moon Phase

Introduced in 2006, this new timepiece from the iconic Gérald Genta Octo collection incorporates a 48-month Perpetual Calendar with cam mechanism, along with a double Northern and Southern hemisphere moon-phase display.

Based on the Gregorian calendar, this perpetual calendar watch takes account of the months with 28, 29, 30 and 31 days, and displays all the indications concerning the date remain correct until the year 2100. In that year, the date will require a one-day manual adjustment.

Gérald Genta Octo 48-Month Perpetual Calendar Moon Phase

In the league of extra-ordinary perpetual calendar watches, this Gérald Genta Octo watch stands out with the 48 month indicator positioned at 3 o’clock. Behind this ingenious display mechanism is a mechanical memory-bank composed of sequences of 28, 29, 30 and 31 days that are repeated every 48 months to correspond to a full leap-year cycle.

The calendar plate was entirely developed, built and assembled in the workshops of the brand’s Manufacture. The plate is then fitted on a Manufacture-made base personalised according to Gérald Genta criteria. Exquisitely decorated above and below, the mainplate, additional plate and the bridges are circular-grained, bevelled, countersunk, engraved and coated with an old-gold finish. The bidirectional winding 18-carat gold oscillating weight placed in the centre also features the same concentric circular graining and engraving.

The date is displayed at 6 o’clock and the days of the week at 9 o’clock. A moon-phase aperture opens onto a disc at 12 o’clock, revealing the moon in the Northern hemisphere, while the lower part shows us the Moon in the Southern hemisphere. Both appear against a star-studded black background.

The Octo 48-Month Perpetual Calendar Moon Phase watch comes with an 18K (5N red or white) gold case. Elegantly designed, it is composed of three parts in solid gold: a diamond-polished octagonal case middle, a round circular satin-brushed bezel with driven-in polished hour-markers, and an open octagonal back secured by 8 pentagonal screws.

Each part is individually crafted and finished by hand, so that the angles and edges remain well defined and perfectly finished. To ensure a clear view of the details, the sapphire crystals are glare-proofed, on both sides for the one protecting the dial and on the inside for the one fitted in the back.

The full surface of the 18-carat gold dial plate is engraved and finely chased, revealing a polished pattern of “cloisons” or partitions. Layers of lacquer are then added to the corresponding parts. The sleek sandblasted dauphine hands enable optimal readability of the multiple indications.

To ensure easy and simple handling of various functions, the function correctors are placed along the case middle. The time-setting and crown placed at 3 o’clock is instantly identifiable thanks to its distinctive shape surrounded by beads and set with a falcon’s eye cabochon.

Each Octo 48-Month Perpetual Calendar Moon Phase watch is numbered and comes with a black hand-stitched alligator leather strap with folding clasp.

Technical details

Model: Gérald Genta Octo 48-Month Perpetual Calendar Moon Phase
White Gold, Reference OQM.Y.60.515.CN.BD

Calibre GG 7080
Exclusive Gérald Genta automatic movement, entirely decorated by hand
28,800 vph
26 jewels
Decorated with circular graining pattern and old-gold color
18K gold rotor
Power reserve: 45 hours

48 months (4 years) display at 3 o’clock
Calendar at 6 o’clock
Day of the week at 9 o’clock
Moon-phases in Northern and Southern hemispheres

18K white gold
Three piece case, octagonal shape
Diameter: 42.5mm
Thickness: 11.55mm
Circular satin-brushed bezel with polished hour-markers
Beaded crown with falcon-eye cabochon
Sapphire crystal front glass with antireflective coating
Exhibition caseback with antireflective sapphire secured with pentagon-shaped screws
Water resistance: 10atm/100m

White gold and cloisonné red and black lacquered dial

Black hand-stitched alligator leather with white gold folding clasp circular-grained and enhanced with the brand logo and symbol

Other versions
Also available in red gold with black and red dial