Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1935
1834-1836
1935
1936
1935
1934
1839 (original); circa 1988 (replica)
1936
1937
1934-1935
1936
1935
1936
1933
1934
1937
1936
1937-1938
1938
1931
1931
1935
1938 and 1951
1934
1935
1903 (original); 1982 (model)
1930
c. 1933
1938
1937
2000-100 BCE
4000-2001 BCE
1937
1935
1935
1931
1934
1930-1932
circa 1938
1935
1930-1931
1933
1930
1955; 1830
1932-1936
1930
1931
1938
1932