1915-S

The 1915-S Barber dime carries a circulation mintage of 960,000 pieces, placing it below the one million mark and ranking it among the smaller S-mint outputs of the late series. The figure looks even tighter once the year is read in full: Philadelphia struck roughly 5.62 million pieces in 1915 while Denver produced none, leaving San Francisco as the only branch issue for the date. That status, combined with a sub-million total, has long drawn specialist attention, and several Barber researchers list the 1915-S among the borderline Semi-Keys of the series. The coin also sits as the second to last San Francisco issue before the Mercury design replaced the Liberty Head portrait in 1916. Charles E. Barber, then Chief Engraver of the United States Mint, designed both sides, and each piece followed the standard 2.50 grams in 90 percent silver and 10 percent copper, struck at 17.9 millimeters with a reeded edge.

Strike quality on the 1915-S runs better than the soft late-S issues of the previous decade, with reasonable hair detail and clean wreath leaves from fresh dies, though softness at the LIBERTY headband shows up on later die states. Authentication centers on the mintmark. A counterfeiter who adds an S to a 1915 Philadelphia coin captures the entire scarcity premium without changing the date, so the suspect letter should be checked for surface continuity with the field beneath the wreath bow. Genuine punches sit centered under the bow with sharp serifs, share the patina of the surrounding metal, and show no raised collar at the foot. A scale should read 2.50 grams in tight tolerance and calipers should confirm 17.9 millimeters. Population data from Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC) thins above About Uncirculated, and the two services disagree sharply on Gem rarity.

For set builders, the 1915-S is the harder of the two business strikes for the date. Good through Fine pieces turn up at shows without much trouble, Very Fine and Extremely Fine coins take more searching, and choice Mint State examples reach four-figure territory once strike and surfaces line up. The safest path is a certified piece from PCGS or NGC, since the added-mintmark risk on raw coins is real. For more context, see the Barber Dimes (Liberty Head) series history.