細節
A vernier sextant by Parkes & Sons
the brass three-circle frame with arc signed J.Parkes & Sons Liverpool, numbered U285 with inlaid silvered scale divided 5- 0- 155, swivel magnifier, three horizon shades, two mirrors (one screw missing), telescope and mahogany handle in fitted box with test certificate and trade label for J. Sewill, securing hooks amd handle, the radius -- 6in. (16.5cm.); the box -- 10 x 11in. (26 x 28cm.)
See illustration
the brass three-circle frame with arc signed J.Parkes & Sons Liverpool, numbered U285 with inlaid silvered scale divided 5- 0- 155, swivel magnifier, three horizon shades, two mirrors (one screw missing), telescope and mahogany handle in fitted box with test certificate and trade label for J. Sewill, securing hooks amd handle, the radius -- 6in. (16.5cm.); the box -- 10 x 11in. (26 x 28cm.)
See illustration