Something a bit different for the next week... about six or seven months ago, I purchased a set of TruVue story cards on eBay. Superfically, they resembled Give-A-Show Projector slides, except that they were a LOT smaller, and the individual slides themselves were actual film slides, as opposed to Kenner's printed-on-plastic slides!
Sawyer's TruVue was an early competitor to View-Master, so far as I can tell. Originally, their 3-D viewer used a card with each slide parallel to the other (kind of like Kenner's later See-A-Show). They were the original publishers of the Batman TV series View-Master, so to speak... sometime they merged with View-Master, and everything went from story cards to the more familiar discs! This set of slides came out in 1959, a year before Kenner's first Give-A-Show set.
These slides that I'm sharing now are all Disney items... there'll be more Disney in another month or so when I get around to scanning more of my Magna-Slides!