A unique early 18th-Century pearwood-mounted plane-table compass, signed in manuscript John Harrison 1718 , the 10.2cm. (4in.) diameter glazed dial with blued-iron needle with brass cap and manuscript paper dial in ink showing a sixteen-point wind rose with East and West transposed, and a 360° circumference scale with 1° subdivisions, with a T-shaped handle and mounting hole ( glass cracked, some staining to card ) -- 20.9cm. (8¼in.) long See Illustrations
A unique early 18th-Century pearwood-mounted plane-table compass, signed in manuscript John Harrison 1718 , the 10.2cm. (4in.) diameter glazed dial with blued-iron needle with brass cap and manuscript paper dial in ink showing a sixteen-point wind rose with East and West transposed, and a 360° circumference scale with 1° subdivisions, with a T-shaped handle and mounting hole ( glass cracked, some staining to card ) -- 20.9cm. (8¼in.) long See Illustrations
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
