Enigma Code Sheets Here are my personal Code Sheets for use in the Enigma World Code Group. Donnerkind/T23 Code Sheet for Kriegsmarine M4 with Beta Rotor Donnerkind/T23 Code Sheet for Kriegsmarine M4 with Gamma Rotor Donnerkind/T23 Code Sheet for Kriegsmarine M3 Donnerkind/T23 Code Sheet for Wehrmacht/Heer EWCG 2015 Code Sheets