Interesting. I did not know about "How Wheel" marbles, which apparently were from the 1990s? The one pictured came from an eBay purchase, a farmer's estate sale. It was one mason jar filled with 95% Vitro tri-lites, a couple of Akros, a few Alleys, and then this one. Everything else was pre-1970s and mint, so it really felt like a time capsule except for this marble, apparently!