細節
H. HUGHES & SON, LTD., London
A Hudson-pattern "three-circle" micrometer sextant, No. 26134, with black crackle-finish, four index mirror shades, three horizon mirror shades, micrometer with electric light assembly and star/sun telescope
A Hudson-pattern "three-circle" micrometer sextant, No. 26134, with black crackle-finish, four index mirror shades, three horizon mirror shades, micrometer with electric light assembly and star/sun telescope