Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1929
1834-1836
1928
1934
1839 (original); circa 1988 (replica)
1933
1934
1929
1931
1931
1934
1903 (original); 1982 (model)
1930
c. 1933
2000-100 BCE
4000-2001 BCE
1934
1931
1928
1930-1932
1930-1931
1933
1930
1955; 1830
1930
1931
1932
1934
1931
1928
1930-1932
1930
1933
1928
1930-1932
1928
1933
1931
1930
Before 1932
1933
1928
1924
1931
before 1928
1928
Before 1932
1930
1938; (1838)