First patented in 1912, the Marxophone is perhaps the hallmark achievement of Henry Marx who sought major improvements and advancements in the zither field during the first part of the 20th century. The Marxophone consists of four sets of chords, C major, G major, F major, and D7, which are strummed or picked with the left hand, accompanying the hammered melodic side. Wooden "keys" are depressed, causing a chain reaction of spring powered hammered melodic goodness. Tonally, the sound produced is similar to a cross between a dulcimer and a harpsichord, with tremolo. Cosmetically, this Marxophone has many dings and scratches throughout, with a large crack on the back, and needs some new strings; metal hammer cover plate loose. A truly enchanting instrument.