Edward John DENT (1790-1853) manufacturer of Marine Chronometer and astronomical clocks was one of the most famous Watchmakers in England. in 1828. his ship chronometer No. 114 won first prize in the Premium Trials with a variation of 1/2 second in 12 months, and the Admiralty awarded him a prize of 300 pound. His chronometers were used on many explorations in Polar regions and tropics. No. 1800 was owned by David Livingstone (1836) during his African exploration. In 1842 Dent was granted the Royal Errant as "Chronometer Maker to the Queen and HRH Prince Albert".
He was the maker of great clock of House of Parliament, known as Big Ben.
Archive record from The Old Royal observatory, National Maritime museum, Greenwich.
No. 1508 is one of only the handful survived ships chronometer actually made by Dent. The 2A and 259 have been lost. and other 3 older were "exchanged" which most likely means returned to Dent's workshop.