
Ten second Kern DKM1 transit theodolite
1971
1971
1876
1901-1930
circa 1950
1816-1850
1890-1900
1950-1954
1823-1841
1850-1876
1910-1915
1870-1880
1826-1850
circa 1990
1892
1876-1900
1926
1915-1925
1871-1900
1959
1911-1920
1835-1845
1901-1915