Details
A 19th-Century single-arm protractor,
unsigned, the arm with vernier scale and centre point, with horn-cased magnifier, and two chart pins arranged to screw into the base line, contained in the original plush-lined and fitted mahogany case -- 10in. (26cm.) wide
unsigned, the arm with vernier scale and centre point, with horn-cased magnifier, and two chart pins arranged to screw into the base line, contained in the original plush-lined and fitted mahogany case -- 10in. (26cm.) wide