I’ve decided to add this to my collection and classify it as a Warhol cover despite my hesitations. This cover clearly displays the blotted line technique Warhol used in the early 50s, and he was hired by RCA Victor to do other covers during this period (1952). Lastly, the apparently never produced Progressive Piano cover was done for this same label at about the same time, sharing strong thematic elements.
The final straw for me was the endorsement given it by Dr. Richard Forrest, perhaps the most knowledgable collector of artist record covers. If he’s convinced, I’ll take that as enough evidence for me to accept this as a genuine Warhol cover.