Lisää soittimia valmistajalta: Matth. Hohner AG
Concerto I
- Accordion type: Piano accordions
Standard Bass Accordions
- Manufacturer: Matth. Hohner AG
- Model: Concerto I
- Trade name: Hohner
Walter Special
Place of manufacture: Trossingen, Germany
Time of manufacture: 1956 –1967
Registers: 3+0
Voices: 2+?
Notes: 26
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