The opening track from 'Anglo Saxon Brown' are finest Philly Sound. Taken from the Monster LP 'Songs For Evolution', a truly Philly Sound Masterpiece, recorded at the Sigma Sound Studios, Philadelphia, Pa.in 1976. In this set you will find more philly classics, but also other soulful disco gems.
You can find a complete tracklist also on my blog:
http://inthelandofmusic.blogspot.de/2017/05/a-soulful-disco-pleasure.html
If you want more philly sounds, then listen to this:
https://www.mixcloud.com/Rumpel_Star/philly-sound-tape/
Or more rare Disco ?
https://www.mixcloud.com/Rumpel_Star/rare-forgotten-disco-takes/