Anime fans in the Western world owe a lot to shows like Robotech and Voltron. Both were Western Cartoons, for lack of a better description, that were cobbled together from early animes and made into new stories. While, with 20/20 hindsight, Voltron is nearly unwatchable, Robotech has fared up somewhat better to the ravages of time. It was even successful enough to spawn actual sequels which went along (to a lesser or greater degree) with the story of the 'cobbled together version.
After the success of early 'remake' style anime, more and more shows started making the transition to English viewership, and while the practice of reusing animation is largely a thing of the past, it did lay the groundwork for how anime is thought of here. Toys and collectibles from the series, needless to say, remain fairly common. Such is the case with these rather interesting Chibi versions of several of the mecha. I think these are from later series, as I don't recognize the human models, though I think the green one is the type of Armor that Miriya used at one point (or a derivative).