拍品 90
90
A 19th Century brass lattice framed sextant, unsigned, with telescope mount, 6:7 shades, mirrors, the index arm with framed vernier scale, tangent screw and clamp, the arc with inset silvered scale divided 0°-130° on three brass pillar feet in shaped mahogany case with telescope - 15¼in.(39cm)wide

細節
A 19th Century brass lattice framed sextant, unsigned, with telescope mount, 6:7 shades, mirrors, the index arm with framed vernier scale, tangent screw and clamp, the arc with inset silvered scale divided 0°-130° on three brass pillar feet in shaped mahogany case with telescope - 15¼in.(39cm)wide