The "" (or sometimes "3 hours") versions are compilations designed for:
Paul de Senneville , a French composer who wrote the piece in 1978. Original Title: Mariage d'amour (Marriage of Love). chopin_spring_waltz_1_hours
While called a "waltz," the piece is written in 4/4 time . True waltzes are written in 3/4 time . The "" (or sometimes "3 hours") versions are