Technical description: Windway runs mouthpipe - 1 - 2 - 3 - 4 - m.t.s. - bell. 1st and 3rd valve tuning-slides adjustable by left hand while playing. Wide mouthpiece receiver; would need wide taper but not too large a cup. Valve type: 4 rotary valves.
General usage of type: The standard model of tuba used in orchestras and bands in German-speaking countries in the early 20th century.