A Kelvin Hughes micrometer 'three-circle' 'Mate' black crackle finish sextant, the inset silver scale in brass arc divided 5° - 0° - 125°, signed 'Kelvin & Hughes Ltd. Mate Ser. No. 61376', four shades to index mirror, three shades to horizon mirror, combined sun/star telescope in wooden carrying box with Kelvin & Hughes Ltd Certificate No. 61376 dated 31/8/54 -- 10½in. (27cm.)