£300
A 7IN. RADIUS BELL-FRAMED MICROMETER SEXTANT BY HEATH & CO LTD, LONDON, CIRCA 1950
the ebonised-brass bell frame with polished brass arc, signed and inscribed as per title and numbered T470, scale divided to 130º, contained within original fitted case, complete with accessories including sighting tubes etc., test certificate for 1972, further contained within canvas outer case -- 11½in. (29cm.)
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