A SPHERICAL ASTROLABE, 19TH/ 20TH CENTURY

Reference: ART3004856

The lacquered sphere inked in red and black, the upper hemisphere marked with almuncantars for every 3° and azimuth quadrants for every 6°, recessed quadrant arc for gnomon (lacking), hour lines, suspension loop at zenit, the sphere contained within a hemispheric leather case, the once hinged openwork lacquered rete with graduated quadrant ecliptic and equator, named stars and five remaining star pointers, minor repairs.
Box diameter: 10.8 cm.