Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1935
1834-1836
1935
1935
1934
1839 (original); circa 1988 (replica)
1935
1934-1935
1933
1935
1934
1931
1931
1935
1935
1934
1935
c. 1933
2000-100 BCE
4000-2001 BCE
1935
1935
1934
1931
1933
1931
1932
1931
1934
1935
1935
1933
1931
Before 1932
1933
1935
1931
1935
Before 1932
1935
1935
1935
circa 1932
circa 1932
1938; (1838)
circa 1932
circa 1932
1934
1934; 1947