拍品專文
Within the top lid is a typewritten label which reads "Artificial Horizon given given by General C.G.Gordon to C.W. Pearson in Khartoum 1878"
細節
A mercury artificial horizon signed on the oxidized and glazed prismatic windscreen ELLIOTT BROS. LONDON iron mercury bottle and mercury trough in mahogany carrying box with brass external drop handles - 8in.(20cm)long