In 1937, the United States Mint produced three half dollar, or 50-cent, coins. The one produced for circulation was the Walking Liberty half dollar. According to the Whitman Red Book, more than 13 million were manufactured, most from the Philadelphia Mint.
The other two designs were commemorative. One recognized the 350th anniversary of Sir Walter Raleigh's founding of the Roanoke Colony as well as the birth of Virginia Dare, the first baby born in the Colonies. The other coin recognized the 75th anniversary of the Battle of Antietam, a Civil War battle between the armies of Generals Lee and McClellan. All three of these coins were minted in a 90 percent silver alloy and are collected for their metal content as well as their history.