Humfrey Cole

Humfrey Cole (c. 1530-91) is the first known maker in the English mathematical instrument trade.
Originally from the north of England, he worked in London.
Described as the maker of the 'oldest theodolite in the world'. Dated 1574.[1]
His instruments included astrolabes, sundials, and theodolites. He also engraved maps, and worked as a die-sinker in the Mint in the Tower of London.
He supplied navigational instruments for the voyages of Martin Frobisher in search of the North-West passage in the 1570s.
The above information is condensed from the Epact website, which also includes links to surviving instruments made between 1574 and 1596.