1942-S

San Francisco contributed 12,708,000 pieces to the 1942 Walker total, a figure that slightly exceeded the Denver output and reflected the West Coast facility's continuing role in supplying Pacific-region commerce during the early war years. Composition followed the established 90 percent silver, 10 percent copper standard at 12.50 grams and 30.61 mm, with the S mintmark applied to the reverse die at the lower left of the rocky perch supporting Weinman's eagle. The S mintmark on 1942 examples typically appears in the standard small style used through most of the 1940s S-mint production.

Strike characteristics on the 1942-S diverge somewhat from the Philadelphia and Denver pattern, with San Francisco coinage of this period showing slightly more variable definition on Liberty's left hand and the eagle's breast plumage. Full Thumb examples exist but appear less consistently than on the Philadelphia issue, and selecting carefully for full design detail is rewarded with stronger eye appeal. Authentication should include confirmation of the S mintmark style and weight verification, with particular attention to any examples showing suspiciously sharp mintmark detail relative to surrounding wear, which can indicate an added or strengthened mintmark on a Philadelphia host coin. Die marker references published by both major grading services document the specific S punch position and reverse rock detail that distinguishes genuine 1942-S strikes from altered Philadelphia hosts.

Mint State availability at PCGS, the Professional Coin Grading Service, and NGC, the Numismatic Guaranty Company, supports active gem trading through MS65, though true MS66 pieces with both strong strike and original surfaces appear notably less often than for the corresponding Philadelphia date. Original-roll material from postwar releases supports the meaningful gem-grade population for the date, though MS66 pieces with strong strike and original surfaces appear notably less often than the Philadelphia equivalent. For more on San Francisco production patterns and the wartime Walker context, see the Walking Liberty Half Dollar series history.