Wehrmacht FF33 Field Telephone additional headphone (Zusatzkopfhörer für den Feldfernsprecher FF33). Accurate intelligence and secure lines of communication are crucial elements to all armies in the field and during WWII each division in the German Army had an integral Signals unit. The Feldfernsprecher 33 was the standard issue field telephone used by the German military during WWII. This is a additional headphone for use with the FF33 field telephone. The headphone comes without headband. It is nicely maker marked and dated 1939. Nice piece of equipment!