Coin ring how it was made

Does anyone know how this is done. I can find plenty of videos on
the net describing the edge hammering technique. 

It’s done by cutting a hole in the coin, turning it into a washer.
Then it’s hammered around a mandrel to form a ring.

http://members.shaw.ca/john_edmonton/HowtomakeaCoinRings[2].pdf
http://www.spiritualflyer.com/Sales.html#anchor_105

Kathy Johnson
Feathered Gems Jewelry