1928-S Walking Liberty Half Dollar. MS-64 (PCGS). OGH. From a mintage of 1.9 million pieces, the 1928-S Walking Liberty half dollar is scarce in MS-64, and rare in any finer grade. The 28-S is a premier strike rarity, with most examples showing flat details in Libertys hand and the eagles leg. This Choice specimen exhibits the usual softness in these areas, but the peripheral details are sharper. The surfaces display bright mint luster and an abundance of deep golden toning.