Hi-Ker yoyos were originally made in Canada by Wilfred H Schlee, beginning in the 1930s. In 1946, Wilfred Jr. moved to the United States and began producing Cheerio yoyos for Sam Dubiner, who had acquired that trademark. But when Sam Dubiner sold the Cheerio trademark to Duncan, Schlee Jr went back to making the Hi-Ker yoyo, the brand his father had manufactured in the 1930s.
The Hi-Ker Flat Top yoyo was introduced in the 1950s. All of the Hi-Ker Flat Top yoyos are in unused condition, with what appears to be the original strings. One of the yoyos is scuffed. The box perforation has been halfway pressed through, but is still attached. There are some minor tears on the box.
We acquired the Hi-Ker yoyos in the Cheerio box, but we don't think that they were necessarily ever sold this way. Cheerio and Hi-Ker do have a history that is intertwined though, so we are keeping them together as we found them.