Casgliadau Arlein

Indo-Persian astronomer's astrolabe, about 1651-1652.

Circular brass astrolabe with engraved plate with a rotating ornamental 'rete' or pierced metal openwork engraved with fixed stars and celestial circles. Reverse has an 'alidade' or sight rule held on by type of butterfly clip. Suspended by a ornate pierced metalwork suspension with thumb-rings. All inscriptions are Arabic.