The Walter Höffle 20/67 organ specification is as follows:

- 5 ranks of 11 pipes: Melody, Vibrato/Celeste, Violin, Quint and Piccolo (all wooden)

- 6 accompaniment pipes

- 3 bass notes, each consisting of a main pipe and a “helper” pipe

- Two double acting feeder bellows, feeding a single reservoir

- Pneumatic valves operated by electric solenoids

- 6 inch / 150 mm water pressure

- Dimensions:  570 (width) x 670 (height) x 430 (depth, w/o crank)