Cryptograph (coding and decoding machine) by Sir Charles Wheatstone, 1843-1875
1843-1875
1843-1875
1840-1848
1956-1960
1905-1915
1905-1915
1910-1940
1954
1897
1905-1915
1840-1848
1910-1930
1822-1893
1835-1900
1881-1932
1890-1900
1925-1935
1910-1930
1950-1955
1955-1965
1895-1910
1870-1910
1837-1900
1880-1991
1870-1930