You're looking at what appears to be an acorn, but is actually something much more distubing. Keep looking. Yes. The Beard of Pete Fountain.

Since this work seems to have gone out of print forever and ever, I feel comfortable offering an example. This is peculiar stuff. It starts out with nice smooth Pete, then it swings. Tiny's having fun, and you get a better sense of his talent. Then at :39 or so it turns into Shakey's Pizza Parlor music. Smoothness returns around 1:38 before it's back to Shakeyland.