Lisää soittimia valmistajalta: Oy Harmonikka
Maestro
- Accordion type: Piano accordions
Standard Bass Accordions
- Manufacturer: Oy Harmonikka
- Model: Maestro
- Trade name: Oy Harmonikka
Place of manufacture: Kouvola, Finland
Time of manufacture: 1955–1957
Registers: 11+5
Voices: 4+5
Notes: 41 (f-a''')
Reeds:
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Weight:
Serial number: