Geo.Graham

Orrery Tourbillon

Limited edition: 20
Ref. 2GGBP.B01A
Specifications
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
Calibre
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 mecanism), 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 which also enables to set the calendar on the case back
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