Inv. no. LNS 1 HS a,d,e,g,h,i
Cut, ground and polished by lapidary means
(a) Height 6.8 cm; diameter 6 cm
East Iranian world, ca. 9th century AD
ca. 6th century AH
LNS 36 M
Brass astrolabe, earliest known Islamic example, signed by Nastulus, dated 315 AH
