Astrological tables
The back of this astrolabe has a number of astrological features. There are astrological tables of triplicities (which link the four Aristotelian elements to the 12 zodiacal signs), of the signs of the zodiac, of the terms and faces of the planets, and the 28 mansions of the moon.
Astrolabe, by Muhammad Amin, Persian, 1673/4 (Inv. 35565)