The SEALED QUADRAPHONIC BILL WYMAN (Monkey Grip) QT 79100 is an 8-track cartridge released in 1974 under Rolling Stones Records. This quadraphonic recording features Bill Wyman's music in four channels, offering a unique sound experience for fans of rock and roll, blues, and rhythm and blues. The gray cartridge is sealed, ensuring the music is preserved in its original condition for collectors and enthusiasts of vintage music formats.