Transit theodolite, British, 1816-1850
1816-1850
1816-1850
1971
1876
1901-1930
1890-1900
circa 1950
1950-1954
1823-1841
1826-1850
1910-1915
1850-1876
1870-1880
circa 1990
1871-1900
1876-1900
1901-1915
1892
1835-1845
1959
1926
1911-1920
1915-1925