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Handharmonium

System: Probst (unisonoric, logical)

(Collection Oriwohl, Nr. 180)

Manufacture: Co. Joh. N. Trimmel (Wien), around 1935
Tonumfang: Es1 - e4. 2-chörig (8'+8°), (H: 34cm, T: 25cm)

Emil Probst from Zurich in Switzerland with his development of a hand harmonium in an article in the magazine Gut Ton from 1932.