EXQUISITE SILVER SECTOR, Continental, possibly Italian, c. early 18th century, bearing a punch mark, and with lovely shaped ends, and roses engraved to the hinge. Overall length is 4″ (10 cm) closed, and the sector is beautifully engraved with doubled sector scales “Arithmetica, Geometrica, Cubica, Gradus Quadrantis.” Additional scales give “demy Pied Roy,” i.e., half the French linear measure of the King’s Foot with subdivisions in inches and twelfths; ‘Reinlendscher. 1/2 Fusz,” i.e., half the Rhineland foot, likewise subdivided;
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