2004 United States Mint Set 22 Coins Inside!. Sealed 2004 United States Mint Set in Original Government Shipped Box, Never Opened! 22 Coins Inside!. The scope of the US MintÂ’s annual coin set expanded with the 2004 Mint Set. The number of coins per set rose from 20 to 22 pieces. This year two different designs were issued for the five cent piece, as part of the Westward Journey Nickel series to commemorate the Louisiana Purchase and the exploration of the western territories by explorers Meriwether Lewis and William Clark. The obverse of the 2004 nickels remained the same portrait of Jefferson, while the reverse carried a depiction of the keelboat used in the expedition and a peace medal given to local inhabitants in the territories. Still in progress was also the design series for the 50 State Quarters Program, which had begun in 1999. For this year, the reverse designs of the quarters featured Michigan, Florida, Texas, Iowa, and Wisconsin. These coins honored the twenty sixth to thirtieth states to join the union. Remaining coins within the annual uncirculated coin set were the Lincoln Cent, Roosevelt Dime, Kennedy Half Dollar, and Sacagawea Dollar. At this point in time, the two largest denominations were not issued for circulation, but only included in collector and numismatic products. Packaging for the set highlighted the new nickel designs, putting large sized images of the coins at the center of each envelope. The other coins were depicted in smaller scale to the side of the envelope. Get your hands on this never opened 2004 mint set!