Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,963 pages of information and 228,875 images on early companies, their products and the people who designed and built them.
Jost Bürgi (also Joost, Jobst; Latinized surname Burgius or Byrgius), 28 February 1552 – 31 January 1632, was active primarily at the courts in Kassel and Prague, was a Swiss clockmaker, a maker of astronomical instruments and a mathematician. See Wikipedia entry.
A sextant made by Bürgi is on display in Prague National Technical Museum.