Bavarian Wall Telephone by Reiner

No. 1235, standard model of the "Generaldirektion der Königlich Bayerischen Posten und Telegraphen", polished walnut cases, station consisting of: early carbon-barrel microphone with wood membrane, main case with three-part crank inductor and switch, 2 Bell-type earphones, double bell and battery case with chromic acid cell, overall height 51 in.