Kriegsmarine Coastal Artillery 'Ffh.39 d' (Festungsfernhörer 39) Headphone (Doppelfernhörer). Marked with 'Ffh.39 d' indicating 'Festungsfernhörer 39 Doppelt'. Normally this type of headset is fitted with a rubber wire and plug that that plugs into the FF33 field phone and desk phone. This example is having a replaced wire and plug, maybe it has been reissued as a Panzer Headphone. It is complete with the rubber ear-cups, these are still in very good and supple condition. The headphones are dated 1942. Rare original 'Festungsfernhörer 39' in very good condition!