The Graham brand takes name and inspiration from the British watchmaker George Graham (1673-1751) who is considered one of the fathers of modern watchmaking. Friend of astronomers like Isaac Newton and Edmond Halley, George Graham created a mechanical model of the solar system which was presented to the Earl of Orrery - from which the invention took its name - in 1713.
To celebrate the 300th anniversary of this achievement, this year Graham unveiled the Geo.Graham Tourbillon Orrery wrist machine (ref. 2GGBP.B01A), a limited edition of 20 pieces in a 48 mm pink gold case with a thickness of 17.60 mm.
|The original Orrery created by George Graham in 1713|
© Museum of the History of Science, Oxford
The Moon is made of rhodium, the Earth of blue sapphire and Mars is represented by a ruby. Finally, the Sun is represented by a pink gold hand-engraved Tourbillon bridge with 2 Phoenix heads celebrating the decoration originally used by George Graham.
The black dial displays three scales: the hours and minutes scale, the Gregorian calendar with the Earth indicating the date, and the Zodiac scale. The hours and minutes hands are off-centred and treated with SuperLuminova.
On the case we find the planets' control crown at 2 o'clock, the manual winding and time adjustment crown at 3 o'clock, the moon corrector at 4 o'clock and the Mars corrector at 10 o'clock. The year counter on the case back enables to identify correction for the planets (Moon: 7 years, Earth: 1156 years, Mars: 25 years).
The Orrery wrist machine developed by Graham will be functional for the next 300 years.