Beschrijving Ludwig Hupfeld A.G., Leipzig. This is pneumatic orchestrion with piano and three violins, driven by a 220V 50hz electric motor. Note: A single string (D, A and E) is played on each of the violins, while the other strings resonate. The traditional violin bow is replaced by an octagonal wheel laced with horsehair. The sensitivity and finesse of the rendition are achieved by the speed of the bow, the pressure of the violins on the bow and the artificial fingers. Thus, several different types of strokes, including legato, staccato and vibrato, can be represented expressively in mechanical form. With this instrument comes about 300 rolls.