Anyone Seen/Heard This?

I picked it up today, the guy in the shop had never seen it before. Its fleetwood mac early stuff with other famous names and is basically an album of recording studio music.

By that I mean in between songs you hear the engineers talking etc. Its a really nice recording, the records are a little disty so I will see to them, but a really good recording if you come by it and you like blues, pick it up.