From Bonhams Auction House:
HISTORIC MARINE CHRONOMETER THAT ACCOMPANIED CHARLES DARWIN ON THE SECOND VOYAGE OF HMS BEAGLE
An important two-day marine chronometer from HMS Beagle, the legendary Admiralty survey ship that took Charles Darwin on an epic five-year voyage to South America and the Galapagos Islands, has surfaced at Bonhams. It will be offered in the 9th July Fine Clocks sale at New Bond Street, London with an estimate of £30,000-50,000.
The previously unrecorded marine chronometer, dated 1825 and signed by William Edward Frodsham, was one of 22 that were on board HMS Beagle. Until now, only two other recorded chronometers from the ship are known to have survived, both of which are owned by the British Museum.
Just wow - it is gorgeous! 
