
Comment by W.B.lbl:
Sounds like it's contingent on which pressing plant turned out which copy that had which label. {Images #1897117 & 1897118} was pressed by All Disc in Roselle, NJ, with Progressive Label & Litho type - and they were apparently the ones that turned out the World Pacific Jazz copies. Sounds like there was a blurring of what was what, once Pacific Jazz turned into World Pacific Jazz after the label designs were revamped to mention Liberty/UA, Inc., in the rim print.