Making a coin ring - GIF

Making a coin ring.

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Previously:

Cutting coins
How coins were minted in the 10th century - GIF
How vending machines sort out fake coins - GIF
Magnet fishing tool for coins - GIF

In the USMC in the 60's, we did it with a stainless steel spoon for a hammer, or a small hammer or block of metal, and just kept tapping the outer edge of the coin and rolling it until we got the ring, you could see the face and reverse of the coin inside the ring.