A replica of a quadrant by the famous English astronomer and mathematician, Edmund Gunter(1581-1626).
This instrument, known as 'The H39 Gunter quadrant', was used to tell the time of day and to simplify astronomical calculations for the Sun. A practical and portable instrument, the quadrant was extremely popular throughout the 17th century as a general measure of time and date i.e. a modern-day calendar.
Reproduced here in brass with lacquer and a wooden stand, this fully-usable version captures the splendour of the original.