1872-S Liberty Seated Half Dollar. W-4. Rarity-3+. Medium-Small S. AU-53 (PCGS). As with all pre-1875 issues in the San Francisco Mint half dollar series, the 1872-S was produced in relatively limited numbers (257,000 pieces) and suffered a high rate of attrition through circulation in the Western United States. From the Abigail Collection, Part II.