David Hall: The 1917 Philadelphia is the most common of the early date (1916-1929) Walking Liberty half dollars in all grades. Mint state examples are usually well struck. Gems have the white satin look of the early Walkers. Gems are available but scarce relative to other denominations. Typically, the smaller denominations were saved more than the larger denominations during this era as face value was an issue when collectors of the day decided which coins to save. It cost a lot less to save new pennies and nickels than it did to save quarters and half dollars. When it came to silver dollars, the government did the saving as silver dollars sat in government vaults until the 1950s and 1960s. But half dollars were probably saved in the smallest quantities during the pre-World War II years.