This is one of four rotors related to an ENIGMA encryption/decryption device, but does not match the serial number of B197.81 nor B198.81. Stamp of approval (inspection) marked with a Nazi swastika.
Per Ralph Simpson of the Cipher History Museum, "The 'A' indicates use by the German Army and Air Force (Navy used 'M' for marine)." [2016-05-09].
Date
ca. 1930
Identifying Numbers
Other number
WaA900
Manufacturing inspection approval (stamp of approval)
