This product is a vintage sheet music for the piano, specifically the 1918 Mozart Sonata No. 15 in D Major K. 576. The sheet music is in its original format and is a single unit. It belongs to the Musicals genre and was published by G. Schirmer, Inc in the United States. This item would be of interest to collectors of vintage and antique sheet music, as well as musicians looking to play classical piano pieces from the 19th and early 20th century.