Mentioned only by Audsley in his entry for Grossoctav, which reads: The name give by Walcker to an open labial stop, of 8 ft. pitch, placed on the First Manual of the Organ in Paulskirche, Frankfurt a. M. The term is used because, strictly considered, the manual is of 16 ft. pitch, containing, including the Principal, three stops of 16 ft. pitch. In the Pedal of the same Organ is a stop of 16 ft. pitch labeled Grossoctavbass.