If memory serves, I found this mint condition promotional flyer inside a 1972 pressing of John Coltrane's Sun Ship. The flyer is double sided and consists of 6 panels. It's printed on beige, textured paper:



Impulse! Records Promotional Flyer — Front, Panels 1 - 3



Impulse! Records Promotional Flyer — Back, Panels 1 - 3
Here are high-res scans of each panel:





