Collectors Of 1961 Nu-Cards Horror Monsters - Blue-Border Examples

Anyone here collect 1961 Nu-Cards Horror Monsters? Especially the blue-border cards? I've been researching the 1961 Nu-Cards Horror Monsters set for an article on Cards Mania. The set has quite a few unusual details. Some first-series cards were distributed in perforated panels, later packs advertised invisible "Ghost Gum," and card #102 has a particularly scarce redemption-back variation. I also found a 1962 legal article documenting Universal Pictures' copyright case against Nu-Cards. The court proceedings are more substantial than I'd expected from the usual hobby summaries. One thing I'm particularly curious about is the blue-border issue. Some collectors describe those cards as prototypes, while Kurt Kuersteiner has argued they could be unauthorized copies. The obscured Nu-Cards address on the backs is an interesting detail. Here's the article with the sources and some recent auction results: https://cardsmania.fun/1961-nu-cards-horror-monsters/ Does anyone here own a blue-border example or know of documentation connecting them directly to Nu-Cards? I'd be interested in seeing it.