
Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1839 (original); circa 1988 (replica)
1940
1938
1938
1938
1935
1938
1940
1928
1932
1955; 1830
1936
1935
1932
1934
1940
1935
1930-1940
1935
1938 and 1951
1929-1935
1936
2000-100 BCE
Before 1932
before 1928
1932
1930-1931
1937
1931
1931
1937
1930
circa 1930
1928
1933
1939
1936
1928
1935
1934
1934
1929-1935
1931
1938-1940
1937-1937
1937-1938
1937-1938
1928
1931