Music Minus One house bag

A generic/all-purpose record sleeve (AKA house bag) for Music Minus One, set in Stripes, with a ‘US’ ligature. The design was introduced in 1976 or before.

From Music Dispatch:

Music Minus One was founded in 1950 and their sing-along and play-along records quickly became an industry standard. For the first time, even hobbyist players could solo with a professional orchestra thanks to the high-quality recordings that accompanied each book. Over the years the library has grown to nearly 900 titles. Most recordings allow the player to listen to the full recording featuring a soloist, then pan the recording to remove the soloist so they could step in and play the lead.