Genuine 1913-1938 Buffalo Nickel made into a shank button, in Colorado. Because they're from actual old, circulated coins, each will differ a bit, as coins do. The wearing of the coin, variance from coin to coin, substantial thickness and heavy weight makes this a soulful, beautiful button. You can definitely tell the difference between these and replicas, which seem too perfect and consistent. 

Domed, 7/8" diameter or slightly less, shank back. Shank opening is 2.25mm.  USA-made.   (We also carry the same button made in reverse; buffalo inside, Indian image showing in front.  For that button, ).  

This Buffalo nickel or Indian Head nickel is a that was struck by the  from 1913 to 1938. It was designed by . 

This coin was made from Cupronickel, which per Wikipedia is also known as copper-nickel, and is an of that contains and strengthening elements, such as and . Despite its high copper content, cupronickel is silver in colour.