This is a small button box measuring 10" x 9" and marked Concertone. It has 10 keys and 4 chord buttons and 10 fold bellows. This is a good solid player. Its made in Germany. One of the chord keys sounds fine for a moment, then gurgles like the demons it channels. Maybe a loose reed. 10 key side is missing the leather brooch for your wrist but its still very playable. Just think of how many salami and wine under yon tree picnics this has been a part of.. Perhaps as many as 6 or 8. History and tone.