A LARGE OTTOMAN TURKISH ASTROLABIC QUADRANT
Ahmad Diya, 1911
the projection marked in black, dated 1329 Hijra [=1911 CE], signed Ahmad Diya, numbered 41, the reverse with sexagesimal trigonometric grid
8in. (20cm.) wide
A LARGE OTTOMAN TURKISH ASTROLABIC QUADRANT
Ahmad Diya, 1911
the projection marked in black, dated 1329 Hijra [=1911 CE], signed Ahmad Diya, numbered 41, the reverse with sexagesimal trigonometric grid
8in. (20cm.) wide
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