拍品專文
Spencer, Browning & Co. produced instruments between 1840 and 1852
細節
A nineteenth century vernier octant
constructed in ebony and brass and signed Spencer, Browning & Co. London together with the original owners name Walter D. Mills on the cross bar, the inlaid ivory scale divided on Ramsdens division engine divided 2½°- 0°- 110°, the vernier with fine-scale adjustment, three shades, two mirrors and pin hole sights -- 9½in. (24cm.) radius
See illustration
constructed in ebony and brass and signed Spencer, Browning & Co. London together with the original owners name Walter D. Mills on the cross bar, the inlaid ivory scale divided on Ramsdens division engine divided 2½°- 0°- 110°, the vernier with fine-scale adjustment, three shades, two mirrors and pin hole sights -- 9½in. (24cm.) radius
See illustration