This is a Deagan 330R Marimba (USA), a percussion instrument played with mallets. Actually, it's a xylophone with wood bars (mahogany) instead of the more common metal bars which are used with the vibraphone. The marimba originally came to the Americas from Africa through the slave trade in the Caribbean. Most African marimbas are tuned to a pentatonic scale. This however is a 2.5 octave chromatic version developed in the early 1900's in the United States using resonating tubes below the bars (not shown), instead of the traditional gourds, patented by Deagan of Chicago, IL. This particular one was built sometime in the 1940's. It still has perfect pitch! (For an assortment of over-the-top marimbas, check out the famous atonal composer Harry Partch to see what he created... )