In 1912, James Fraser designed the Buffalo Nickel. He designed both the obverse and the reverse. These coins were first struck on February 22, 1913, but they weren't put into circulation until March 4th, 1913. Proof coins were made from 1913 to 1917 for collectors. They were in circulation from 1913 to 1938 and were minted in Philadelphia, Denver, and San Francisco. Ultimately, it was replaced by the Jefferson Nickel.  There are 2 varieties which are straight ground and the other is a little mound on which the buffalo stands. The Buffalo Nickel is 75% nickel and 25% copper. It is a really interesting coin and is not particularly expensive. The name of the buffalo on the reverse was Black Diamond and he lived in the Central Park Zoo.  The Native American on the obverse is a combination of three Native Americans. ( Thanks Mike). In my collection, I have a 1930 S, 1935 D, 1936, and a 1937 D nickel. They minted approximately 1,212,995,919 through the 25 years it was around. There are about 64 different types of coins from mintmarks, dates, and major varieties. 

The U.S started minting proof coins as far back as the 1850s through very few were made. Philadelphia made the first proof sets and coins, but in 1968 it switched over to the San Fransisco mint. Some do not have a mintmark and can be very valuable. They started making sets in 1936 which was more than 85 years ago. As seen in one of the pictures, most sets have a certificate of Authenticity (Shout out for Mike) Keep your coins in cases!

The  Peace dollar was made to remember the peace of world war 1.  They were minted from the San Fransico, Denver, and the Philadelphia mint.  They were from 1921-1928 then 1934-1935. The Peace dollar was 90% silver and 10%, copper.  The rarest types are the 1928 P, for only 360,649 were minted.  At coin study. com, it shows that the average price is around 45-$50. There were approximately 190,577,279 minted.