A 19th Century oxidized brass tulip-frame vernier sextant, signed and numbered on the main arc G. de Koningh. Arnhem, Amsterdam No 2142, the index mirror with three coloured shades and star refractor, 20 cm radius index arm, the vernier with swivel magnifier, inset silver scale divided -5o-0o-130o, star telescope, with other accessories in later fitted mahogany carrying box with Kon. Ned. Meteorologisch Instituut certificate and dated 3 november 1948 - the box 28 cm wide