A Kangaroo-Split Cover?

We were logging records into the Jazz Collector Price Guide the other day and we came across a term that was new to us: A Kangaroo-Split Cover? This was in reference to the LP Johnny Griffin, Argo 624. We don’t have the record, so we are going by the picture. It looks like you turn the record to the side and flip part of the cover to reveal the record, sitting in half of the jacket, as if it were a baby in the pouch of a kangaroo. We have three questions for our readers: (1) Is our description accurate? (2) Is the term “Kangaroo-Split” commonly known? (3) Are there other jazz records that have a similar cover? This record, by the way, was in M- condition and sold for $285.