1991 Commemorative Coins from the United States Mint. There were three separate commemorative coin programs for 1991, featuring Mount Rushmore, the Korean War Memorial, and The United Service Organizations. This created a total of five different coin designs amongst the programs.

The 1991 USO Silver Dollar was released to mark the 50th anniversary of the United Service Organization. Surcharges from the sale of coins were to be paid to the United Service Organization and to reduce the national debt. Due to the uninspiring design and low sales, the United States Mint reportedly lost money on this [...]

The 1991 Korean War Memorial Silver Dollar was issued for the 38th anniversary of the Korean War. The oddly chosen anniversary date is the result of the division between North and South Korea at the 38th degree of latitude. The only commemorative coin of the program was the silver dollar.
The obverse of the 1991 Korean [...]

The 1991 Mount Rushmore Commemorative $5 Gold Coin was issued for the golden anniversary of the Mount Rushmore National Monument, so it was fitting that a gold coin should be included in the offering. Along with the $5 gold, commemorative silver dollars and clad half dollars were also issued.
The 1991 Mount Rushmore $5 Gold coin [...]

The 1991 Mount Rushmore Commemorative Silver Dollar was issued for the golden anniversary of the national monument. Also issued were clad half dollars and $5 gold coins. Surcharges raised from the commemorative coin program went to the Mount Rushmore National Memorial Society of Black Hills and the US Treasury.
The obverse of the Mount Rushmore Silver [...]

The 1991 Mount Rushmore Half Dollar was issued in celebration of the 50th anniversary of the Mount Rushmore National Monument. The clad half dollar was issued along with a silver dollar and $5 gold coin for a total of three different issues.
The half dollar commemorative depicts the four face carved onto Mount Rushmore, George Washington, [...]