
The provided context from the search results is not sufficient to answer your question. Based on general numismatic knowledge, the mint mark on a 1972 Eisenhower dollar is located on the obverse, or "heads" side, of the coin. You can find it directly below the portrait of President Dwight D. Eisenhower's neck and just above the "72" in the date 1972.
In 1972, Eisenhower dollars were produced at three different U.S. Mint facilities. Coins minted in Philadelphia have no mint mark. Those struck at the Denver Mint feature a "D" mint mark, and those from the San Francisco Mint have an "S" mint mark.
It is important to note that only the coins with the "S" mint mark are the 40% silver versions, which were sold to collectors in both uncirculated (Blue Ike) and proof (Brown Ike) formats. The Eisenhower dollars intended for general circulation, which were struck in Philadelphia and Denver, are made of a copper-nickel clad composition and do not contain any silver.


