A fine T oxidised brass framed vernier sextant, the main arc with silvered scale and engraved SEWILL Liverpool & Glasgow Maker to the Royal Navy, the index arm with swivel magnifier, micrometer adjustment and locking screw, seven shades, mirror, three telescopes, tommy bar and key, in fitted mahogany case -10¼in(26cm)wide; radius - 7in(17.8cm)