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Joost Bürgi, Sextant


Joost Bürgi (1552-1632)
Sextant, ca. 1600
Prague, Národní Technické Muzeum, inv. 17195

Built by the most famous clock manufacturer of the late 16th and early 17th centuries (who also worked for Holy Roman Emperor Rudolf II), this triangular astronomical sextant can be used by two observers at once.