AN OTTOMAN WOODEN ASTROLABE QUADRANT, SIGNED OSMAN NURI, TURKEY, DATED 11 SAFAR 1281 AH /16 JULY 1864 AD

Reference: ART3001679

With markings in red and black, gilt decoration, red painted edges, two cartouches to the front, the reverse with further cartouche and sexagesimal trigonometric grid. In fitted case 18.8 cm across at widest. Inscriptions: in the long cartouches on either side instructions.