Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1839 (original); circa 1988 (replica)
1926-1932
1925-1926
1990-96
1934
c. 1933
1921
2000-100 BCE
1921
1934
1925
1928
4000-2001 BCE
1926
1934
1955; 1830
1925
1931
1926-1928
1932
1930
1934
1926-1934
1927
1928
1928
1924-1930
1931
1923
Before 1932
before 1928
1928
Before 1932
circa 1927
1930
1928-1930
1928-1930
circa 1932
1925
circa 1932
1930-1931
1922
1930
1928-1930
1927
1931
1923
1610; 1923
1926