GRAHAM GEO.GRAHAM Tourbillon Orrery Limited Edition

Swiss luxury watch maker GRAHAM, which traces its origins to legendary London clockmaker George Graham (1673-1751), is introducing the limited edition GEO.GRAHAM Tourbillon Orrery timepiece to celebrate the 300 years of Orrey (mechanical solar system).

The first Orrery was invented by George Graham, renowned watchmaker and pioneering scientist of the Age of Enlightenment.

George Graham created the first mechanical solar system model, in 1713. The invention was presented to Charles Boyle, 4th Earl of Orrery, from which all such tellurians and planetariums take their name.  Now GRAHAM presents the highest level of innovation in watchmaking with a three-dimensional Tourbillon Orrery.

Developed in association with Christophe Claret Manufacture in Le Locle, Switzerland, the Orrery includes the Moon, Earth, Mars and the Sun based on a 300-year calendar.

The Sun represented by a pink gold (18K) hand-engraved Tourbillon bridge with 2 Phoenix heads celebrates the decoration used by George Graham. The year counter on the case back enables to identify correction for the planets (Moon: 7 years, Earth: 1156 years, Mars: 25 years).

The wrist Orrery developed by GRAHAM is functional for the next 300 years. The GEO.GRAHAM Tourbillon Orrery will be produced in a limited edition of 20 pieces.

The GEO.GRAHAM Tourbillon Orrery is equipped with Calibre G1800, a high precision mechanical movement exclusively made by Christophe Claret, the Swiss watch and movement manufacture renowned for their exceptional grand complications.

The Black dial has Geo.Graham Tourbillon Orrery inscription at 4 o’clock. The dial is equipped with 3 scales – from the outside to the centre: hours and minutes scale, Gregorian calendar (365.25 days – Earth indicates the date), and Zodiac scale (12 astrological signs – Earth indicates the zodiac sign)

The 48 mm pink gold (18K) case features  Pink gold (18K) right hand control crowns (planets’ crown at 2 o’clock, manual winding and time crown at 3 o’clock), Moon corrector at 4 o’clock and Mars corrector at 10 o’clock.

One can admire the magnificent and complex watch mechanism through the see-through sapphire crystal case back that also features 100-year scale and, Moon & Mars correction indicators. The serial number is hand-engraved on the case back.

Technical details

Model: GEO.GRAHAM Tourbillon Orrery, Ref. 2GGBP.B01A
Limited edition of 20 pieces

Functions
Manual Tourbillon Orrery, mechanical solar system model with 100 years calendar (two additional graduations of 100 years – 300 years in total)
Year counter on the case back with planet correction indicators (Moon: 7 years, Earth: 1156 years, Mars: 25 years)
Hours, Minutes

Movement
Calibre G1800, high precision mechanical movement exclusively made for GRAHAM by Christophe Claret with Haute Horlogerie finishing, circular “Côtes de Genève” decoration, Tourbillon Orrery (solar system mechanism), 21’600 A/h (3Hz), Incabloc shock absorber
35 jewels
Power reserve: 72 hours – 2 barrels

Case
48 mm pink gold (18K) case
17.60 mm thick
Pink gold (18K) right hand control crowns (planets’ crown at 2 o’clock, manual winding and time crown at 3 o’clock), Moon corrector at 4 o’clock, Mars corrector at 10 o’clock
Pink gold (18K) bezel
Dome sapphire crystal (semi-spherical), anti-reflective coating on both faces; Full size dimension: 43.5mm opening
See-through sapphire crystal case back with 100-year scale, Moon and Mars correction indicators and serial number hand-engraved
Water resistance: 160 feet / 50 m / 5 bar

Dial
Black dial with Geo.Graham Tourbillon Orrery inscription at 4 o’clock
3 scales – from the outside to the centre: hours and minutes scale, Gregorian calendar (365.25 days – Earth indicates the date), Zodiac scale (12 astrological signs – Earth indicates the zodiac sign). Counter-clockwise reading
Solar system: The Moon (rhodium, Ø0.90 mm); The Earth (blue sapphire, Ø3.20 mm); Mars (ruby, Ø1.70 mm); The Sun (pink gold (18K) – hand-engraved Tourbillon bridge with 2 Phoenix heads inspired by George Graham decoration and a close set diamond at the centre (Ø2.50mm). Counter-clockwise reading
Off-centre skeleton pink gold (18K) hands with black Super-LumiNova coating

Strap
Hand-sewn black croco
Pink gold (18K) pin buckle