All Buffalo Nickels 1913-1938, Jefferson Nickels 2005, Kansas state quarter 2005, North Dakota state quarter 2006
Put a picture of the coin!
No US half dollar has a bison on it. The picture of a bison was used on US nickels. I think you mean BICENTENNIAL. If so, please see the Related Question.
The penny is the only coin that has a picture of Lincoln on it.
Which coin did you have in mind?
The picture on the back of the Sacajawea coin is a young Shoshone woman. She has her infant son on her back in a wrap. This coin was a replacement for the Susan B. Anthony coin.
Your coin is a medallion probably rare. Where did you find the coin?
The penny.
platapus
Sacajawea
This coin was minted in 1987 for the Centennial of South Dakota. It is a one ounce .999 pure gold coin. It was minted by the Tri-State Mint of Sioux Falls.
Pictures of a specific coin are difficult to come by. Usually you should be able to find one on eBay, but the picture is withdrawn after the coin is sold. The only Five Pound coin issued in 1981 was a "Proof in gold FDC" coin.
See link to Australian one-dollar coin