2004 20 piece United States Mint Set w/Sacagawea Dollar in the Original Government packaging. 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.