Wehrmacht FF33 Field Telephone additional single 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 is complete with its original wire but missing its plug. It is nicely maker marked and dated 1934. Nice piece of equipment!