£400 - £600
Ø A 9½IN. VERNIER OCTANT BY HORNE & THORNTHWAITE, LONDON, CIRCA 1850
with ebony pi frame with inset ivory scale and maker's plate, lacquered brass fittings including shades, mirrors, index arms, contained in keystone case with sighting tubes and maker's label -- 12in. (30.5cm.) wide, IDN: EAEKSYAL
One leg detached.
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