
Three-ring Enigma cypher machine in oak wood transit case
1934
1934
1839 (original); circa 1988 (replica)
1923
1938
1920
1938
1938
1935
1938
1928
1922
1932
1955; 1830
1918
1936
1935
1932
1926
1918
1925-1928
1934
1918
1920-1929
1916-1917
1916
1935
1927-1929
1920-1925
1917
1935
1938 and 1951
1929-1935
1925-1935
1926
1936
2000-100 BCE
1920-1928
1920-1928
Before 1932
before 1928
1920-1935
1932
1930-1931
1923
1925-1935
1917-1918
1918-1920
1937
1931
1931