A Franz Hell accordeon. It has just 4 bass tones, and 20 trebles. Option of 3 different tunes in the discant register. Obtained in bad condition, several tones damaged from rust.
Treble side, and the reigisters

Other informations
Made by: Franz Hell, Elmshorn
Made in: (1920)
Materials: Wood, Bellows of goat-skin,supported with cardboard.
Condition: Not able to play, restoring stands ahead

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