This is a rare musical instrument with its original glasses. These were filled with water and played by rubbing a finger on the glass's outer rim. Different size glasses produced different notes. This is a labeled example, see the label attached to the inside of the top. Also, there is a related example by the same maker owned by the Maryland Historical Society and illustrated in Furniture in Maryland, 1740-1940, item 114 (see scan). The cabinetry is also superb, and this piece is attributed to the cabinetshop of Needles or Barry. Note the Needles style heavy reeded saber leg and beautifully carved paw feet (see detail).

A popular Youtube video shows how an accomplished musician (or two) can use this instrument. 
Sugar Plum Fairy by P.Tchaikovsky - Glass Harp LIVE

Height: 37 1/2 in. Width: 36 in. Depth: 23 in.

sw01040 - SOLD