Lehar The Merry Widow Waltz, for piano duet(1 piano, 4 hands), PL801 for Piano Duet written by Franz Lehar. The format of this sheet music is Score and it’s published by FCMUSIC. Lehar The Merry Widow Waltz, for piano duet(1 piano, 4 hands), PL801 is part of the following sheet music categories: 20th Century.