Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1935
1929
1834-1836
1935
1936
1935
1928
1934
1839 (original); circa 1988 (replica)
1936
1926-1932
1937
1927-1928
1934-1935
1936
1990-96
1936
1935
1933
1926
1937
1934
1929
1936
1927
1926
1927
1937-1938
1931
1938
1931
1929-1935
1935
1938 and 1951
1935
1934
1903 (original); 1982 (model)
c. 1933
1930
1938
1937
2000-100 BCE
1937
4000-2001 BCE
1935
1934
1927-30
1928
1931