細節
A late 18th-Century French brass graphometer,
signed Charot à Paris, with finely engraved scales, the alidade with two vernier scales and fixed sights, the limb with fixed sights and ball and socket tripod or staff mounting, in the original shaped wood case -- 11¼in. (28.5cm.) wide
signed Charot à Paris, with finely engraved scales, the alidade with two vernier scales and fixed sights, the limb with fixed sights and ball and socket tripod or staff mounting, in the original shaped wood case -- 11¼in. (28.5cm.) wide