Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1929
1834-1836
1934
1930 (replica); 1834 (original)
1839 (original); circa 1988 (replica)
1933
1934
1929
1931
1931
1934
c. 1933
1930
1930 (replica); 1834 (original)
1930
2000-100 BCE
4000-2001 BCE
1931
1934
1930-1932
1933
1930-1931
1930
1930
1931
1932
circa 1930
1934
1931
1930-1932
1930
1933
1930-1932
1931
Before 1932
1930
1933
1931
Before 1932
1930
1938; (1838)
circa 1932
circa 1932
circa 1932
circa 1932
1934
circa 1930
1929
1934; 1947