Details
A 19th-Century silver and burnished steel contact goniometer,
signed Richer à Paris, with finely divided protractor scale, one quadrant hinged and secured by a bar with clamp screw, in green plush-lined and fitted leather-covered case -- 5in. (12.7cm.) wide
See Colour Illustration and Detail
signed Richer à Paris, with finely divided protractor scale, one quadrant hinged and secured by a bar with clamp screw, in green plush-lined and fitted leather-covered case -- 5in. (12.7cm.) wide
See Colour Illustration and Detail