This unique seven-string guitar by Hermann Hauser I was built in 1924. The two-piece top is made of spruce wood and is framed by dark and light purflings which can also be found around the sound hole. The two-piece back and the ribs consist of strongly flamed maple. The head is connected with the neck by a German mortise joint. Neck and body are connected with each other by a Viennese neck-body connection and the fingerboard protrudes the sound hole. The guitar is in very good condition and has only a repaired crack below the bridge.