AN OTTOMAN TURKISH ASTROLABIC QUADRANT
AN OTTOMAN TURKISH ASTROLABIC QUADRANT

YUSUF BABA, MID TO LATE 19TH CENTURY

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AN OTTOMAN TURKISH ASTROLABIC QUADRANT
Yusuf Baba, mid to late 19th century
the projection marked in red and black with the ecliptic graduated, with gilt in places, signed Yusuf Baba but undated, gilt decorations to cartouche, the reverse with sexagesimal trigonometric grid and gilt cartouche
6in. (15cm.) wide

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