SB-Zusatz FF33 telephone handle cradle

Nice and rare accessory for the FF33 field phone. This device was attached to the top of a FF33 and allowed the handset to be placed in the cradle, depressing the buttons and disconnecting the line. Basically turning the FF33 into a desk model. Produced by Ferdinand Schuchhardt, Berliner Fernsprech und Telegraphenwerk in 1937. The bakelite housing features a BAL mark which indicates this SB-Zusats is a Luftwaffe issued piece! Excellent and hard to upgrade FF33 field telephone accessory which are very hard to find!