This video popped up when I was watching Adam's "throwdown" video. I'm not sure when it was filmed; it was posted in December. It's a great demonstration of the stylistic and tonal differences between two great harp players.
This song came out 1990. Definitely seems like Charlie's band from that Ace of Harps/Signature time period. Clarke's Tip of the Top CD has a Musselwhite cut "Charlie's Blues."
