Listen to Piano Concerto No. 25 in C Major, K. 503: III. Allegretto online. Piano Concerto No. 25 in C Major, K. 503: III. Allegretto is an Instrumental language song and is sung by Edwin Fischer/Philharmonia Orchestra/Josef Krips. Piano Concerto No. 25 in C Major, K. 503: III. Allegretto, from the album Icon: Edwin Fischer, was released in the year 2010. The duration of the song is 8:38. Download Instrumental songs online from JioSaavn.