Editing Enigma machine (section)

==== Funkschlüssel C ====
The Reichsmarine was the first military branch to adopt Enigma. This version, named ''Funkschlüssel C'' ("Radio cipher C"), had been put into production by 1925 and was introduced into service in 1926.{{sfn|Kahn|1991|pp=39–41, 299}}

The keyboard and lampboard contained 29 letters&nbsp;— A-Z, Ä, Ö and Ü&nbsp;— that were arranged alphabetically, as opposed to the QWERTZUI ordering.{{sfn|Ulbricht|2005|p=4}} The rotors had 28 contacts, with the letter ''X'' wired to bypass the rotors unencrypted.{{sfn|Stripp|1993}} Three rotors were chosen from a set of five{{sfn|Kahn|1991|pp=40, 299}} and the reflector could be inserted in one of four different positions, denoted α, β, γ and δ.{{sfn|Bauer|2000|p=108}} The machine was revised slightly in July 1933.{{sfn|Stripp|1993|loc=plate 3}}