Arcs of boxwood; limbs of rosewood. Missing vanes, ivory plate on horizon limb, and ivory note plate on back of brace. Greater arc, 0-65 degrees every one degree, with vane edge calibrated 0-60 degrees every 5 degrees. End of arc broken off. Short arc, 65-90 degrees every ten degrees on inner edge, and 0-25 degrees every five degrees on outer edge; by transversals to one degree. Clusters of circles; scrolling end.
Material
Unsigned. Marked at the end of the main strut (stamped): 4
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