Several albums credit the "Karl King Band" from SESAC Recording sessions, one could assume from this very session: "The Band's the Thing," "Touchdown!" "Proudly We Hail," and "Glory of the Gridiron."
If you look at the picture, you'll note two medium bore King rotary valve tubas, two double bell baritone horns. It's impossible to determine the make of the baritones even in a larger image.
Very interesting.
Anyone got names for the players?





