Perpetual Calendar Quadrant This beautiful compass is crafted

This beautiful compass is crafted from a wooden base with brass top and cover

Sundial (equatorial universal dial)

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

there is a sundial of folding gnomon

Perpetual Calendar Quadrant This beautiful compass is craftedThis 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"