PB
"Dark Side of the Moon" it was, chimps.
https://www.collectors.com/entertainment-item/nick-mason-dark-side-of-the-moon-pink-floyd-signed-new-albu/-5897555567101297970
https://www.collectors.com/entertainment-item/roger-waters-nick-mason-signed-pink-floyd-dark-side-of-the/8366386475985491946