Luftwaffe Air Signals 'B' Class Teleprinter Operators (Luftnachrichtenpersonal mit Fernschreibprüfung "B") Trade Badge (Tätigkeitsabzeichen). The Air Signals Teleprinter Operators Badge was introduced on 8 November 1935 for wear by qualified personnel. The badge is executed in silver-white linnen, embroidered on a blue-grey woolen background, having a nice black backing cloth. Nice example in very good condition!