An oxidised brass 'three-circle' pattern sextant, signed on the arc J. Coombes, Optician & Admiralty Agent, Devonport , with silvered scale, the frame with telescope mounting socket with vertical screw adjustment, seven shades, mirrors, the index arm with vernier and magnifier and engraved J.M. Steel, R.N. with boxwood handle and ivory aide-memoire plaque, with three telescopes and two eye-pieces in mahogany case with leather cover -- 6¼in (15.9 cm) wide See illustration
An oxidised brass 'three-circle' pattern sextant, signed on the arc J. Coombes, Optician & Admiralty Agent, Devonport , with silvered scale, the frame with telescope mounting socket with vertical screw adjustment, seven shades, mirrors, the index arm with vernier and magnifier and engraved J.M. Steel, R.N. with boxwood handle and ivory aide-memoire plaque, with three telescopes and two eye-pieces in mahogany case with leather cover -- 6¼in (15.9 cm) wide See illustration
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
