Vintage Sky King secret compartment ring featuring a square cream-colored faux stone top that slides or lifts to reveal a hidden space. This classic 1940s-era radio premium collectible displays an embossed eagle design on the shoulders with “Sky King” text. The adjustable gold-tone base shows a heavy patina and character from years of play and wear, making it a perfect piece for collectors of cereal premiums or mid-century memorabilia. Keywords: Radio Premium, 1940s, Cereal Prize, Secret Stash, Hidden Compartment, Aviation, Americana, Toy Ring, Mid Century, Nostalgia, Collectible, Costume Jewelry, Patina, Antique Toy