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A FINE SAFAVID BRASS ASTROLABE SIGNED MUHAMMAD ZAMAN AL-MUNAJIM AL-MASHHADI AL-ASTURLABI, MASHHAD, IRAN, 17TH CENTURY The brass mater with calligraphic cartouche leading to an undecorated throne, suspension shackle above, the rim graduated 0-360° by 1° with larger markings every 5°, with four plates elegantly engraved on both sides each bearing stereographic projections for latitudes 28°, 30°, 31°, 33°, 34°, 35° and 36°, all with inscriptions in elegant naskh and nasta'liq, the rete with 28 named star pointers, the reverse with shadow square, trigonometric quadrant and lines for unequal hours, graduated alidade lacking one site, the throne with inset recess for compass (lacking) 6 7/8in. (18cm.) high overall; 5 3/8in. (14cm.) diam.