The akkordolia is a

zither Zithers (; , from the Greek word ''cithara'') are a class of stringed instruments. Historically, the name has been applied to any instrument of the psaltery family, or to an instrument consisting of many strings stretched across a thin, flat bo ...

from Germany and Austria, consisting of a long box, with the strings being pressed against the fretboard by pressing down buttons from above, similar to the Japanese taishogoto. One row of buttons changes the melody, and the other row of buttons can change the chord which backs the melody. The instrument was invented around the start of the 20th century by Otto Teller of Klingenthal, Germany, and was produced locally there by

cottage industry The putting-out system is a means of subcontracting work. Historically, it was also known as the workshop system and the domestic system. In putting-out, work is contracted by a central agent to subcontractors who complete the project via remote ...

References

Typewriter zithers German musical instruments Austrian musical instruments {{zither-instrument-stub