The Brass Qibla instrument
Diameter 22.5 cm.(~9 inches).
It is missing the compass, and probably a sundial.
Estimated to have been made in Iran about A.D.1700.
Centered on Mecca and indicates the Qibla to that city.
The coverage is from 10 N to 50 N and 60 degrees on either side of Mecca.
A remarkable demonstration of Arabic skill in mathematics as well as engraving.
The map projection resembles that of Craig from 1910.
Sold at auction in London in June of 2000 for $70,500.
A second, similar, instrument was discovered in 1995.