✅ SOLVED lead/nickel object with alphabet on it

[jobrian]

good evening! this object is made of lead or nickel, chimes in at 57 on the teknetics. It is 1 3/8" in diameter. It has the alphabet on it and looks like it might have a symbol, possibly the letter "A" on the inside. No markings on back. Possibly an old decoder?

 

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[Charlie P. (NY)]

Part of a 1930's decoder ring. Hoverboy, perhaps?



Drink Ovalmaltine.

 

[BosnMate]

Yes, the secret coded message would be broadcast over the radio, and if you had sent 25 cents and the label to purchase the decoder, you would be able
to decode the message. I remember being very upset, because the secret message said, "Drink your Ovaltine," which made me so mad I never decoded another
message.