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17th and 18th century
is in the British Museum of London
This instrument is based on the eastern astrolabe now in the collection of the Adler Planetarium in Chicago made by the the famous craftsman Diyal'al Din Muhammad in 1647
In the style of the compendiums
Nautical or Marine compass with Cardan system
Perpetual Calendar Quadrant 17th and 18th centuryThis calendar starts on January 1st, 1600 and ends December 31st, 2799 it is based on the repeating cycle of 400 years and a solar cycle of 28 years. It works by means of the "Dominical Letter" This beautiful instrument is fashioned of brass and comes complete with wooden base and booklets explaining method of use and historical context. Diameter: 3. 54" Thickness: 0. 24"
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