When they are made by folding them over a metal ring tool, like those in the link, someone here said his made this way wore quickly. HOWEVER, when they are made by spooning, this is not the case. To the OP, I know this thread is old, but I just gotta say: Those coins are ruined. The reason you use a spoon, and not a hammer is to keep the round shape of the coin. Once you hit it ONE TIME where there is a 'ding' in the shape, it's over. Get another coin... start again.
Double sided coin rings are really unique because they display the coin's detail on both the inside and outside of the ring. They are more durable than you might think and are available in a wide range of metal types. I have seen several that were over 25 years old and they look great. The thing you have to keep in mind is that they don't cost an arm and a leg so even if it wears out you can always buy another one. Consider what an antique ring would cost compaired to a hundred year old coin ring. They are a bargin. When the coin says 1911 you can be sure its 100 years old. You can't be sure that a ring in a jewelry store is 100 years old no mater what you are told.
Take a look at these. Tell me you wouldn't want one of these? http://imgs.inkfrog.com/pix/TheCoinSmith/KHD1972_Rb.jpg http://imgs.inkfrog.com/pix/TheCoinSmith/BH1915_Oa.jpg http://imgs.inkfrog.com/pix/TheCoinSmith/FHD1950_Ob.jpg http://imgs.inkfrog.com/pix/TheCoinSmith/1912_BH_1.jpg http://imgs.inkfrog.com/pix/TheCoinSmith/1939WLH_1.jpg
Nice. Being a variety Cent collector, that would catch my eye more. Probably the problem would be sizing a ring. It might be too small to make fit on an 11 ring finger. LOL
I would rather you not. Also I notice you are using another of my images with my website on it. These images are my work product and used in the sale of my coin rings. Please stop.
Judd, I own one of your Kennedy Half Dollar rings and must say that the craftsmanshio is simply outstanding!