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December 29, 2025

This Lone Ranger Atomic Bomb Ring Contained Polonium-210, One of the Most Dangerous Radioactive Isotopes Known to Man

In the nuclear-obsessed 1940s, atomic energy was celebrated as the cutting edge of progress and modernity, capturing the imagination of the public. Capitalizing on this fascination, Kix cereal launched a bold promotion in 1947: for just 15 cents and a cereal box top, children could receive the Lone Ranger Atomic Bomb Ring. The ring promised excitement and novelty, tying a popular comic hero to the era’s atomic craze, and appealed directly to the curiosity and thrill-seeking of young consumers.




But the “toy” was far from harmless. Each ring contained a tiny amount of polonium-210, a highly radioactive substance, paired with a zinc sulfide screen that would glow when struck by alpha particles. While marketed as safe as long as it wasn’t ingested or inhaled, polonium-210 is among the most toxic substances known, making the ring an unsettling example of the era’s cavalier attitude toward radiation. At the time, very few questioned the potential dangers, and the public’s fascination with all things atomic often outweighed concerns for safety.

Polonium-210 is a highly radioactive alpha-emitter. While alpha particles cannot penetrate the outer layer of human skin, the substance is extremely dangerous if inhaled or swallowed. Because polonium-210 has a very short half-life (138 days), almost all the radioactivity vanished within a few years of the ring being manufactured. Any surviving rings today are virtually non-radioactive (having decayed into stable lead), though they no longer produce the “flashes” they once did.





Today, the Lone Ranger Atomic Bomb Ring stands as a bizarre museum artifact, a chilling reminder of a period when radioactive materials were marketed as novelty items for children. Because these rings were made of fragile plastic and aluminum, finding one in good condition with the red tail-fin intact is difficult. Depending on condition and whether the original mailing box and instructions are included, these rings typically sell for $100 to $400 on the collector's market.

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