George Daniels 18K YELLOW GOLD ONE-MINUTE TOURBILLON WITH DANIELS SLIM CO-AXIAL ESCAPEMENT

An 18K yellow gold chronograph with Daniels Independent Double-Wheel Escapement, mean-solar and sidereal time, age & phase of the moon and equation of time indications circa 1982. Space Travellers’ Watch. Sold for £914,850 from an estimate of £400,000-£600,000