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
1937
1934-1935
1936
1933
1935
1936
1934
1937
1936
1929
1931
1936
1937-1938
1938
1931
1935
1929-1935
1938 and 1951
1934
1935
c. 1933
1930
1937
1938
2000-100 BCE
4000-2001 BCE
1937
1935
1935
1934
1931
1928
1930-1932
1933
1930
1930-1931
1930
1932-1936
1931