Listen to Mozart: Symphony No.17 in G, K.129 - 1. Allegro online. Mozart: Symphony No.17 in G, K.129 - 1. Allegro is an Unknown language song and is sung by Royal Philharmonic Orchestra and Erich Leinsdorf. Mozart: Symphony No.17 in G, K.129 - 1. Allegro, from the album Music for Walking: Mozart, was released in the year 2021. The duration of the song is 3:11. Download Unknown songs online from JioSaavn.