1913-S

The 1913-S Barber dime stands as one of the recognized Semi-Keys of the Liberty Head series designed by Charles E. Barber, Chief Engraver of the United States Mint, which ran from 1892 through 1916. The San Francisco Mint delivered just 510,000 circulation pieces, the second lowest business-strike output for any S-mint Barber dime, trailing only the 1901-S Semi-Key at 593,022 coins. Each example follows the standard specifications of 2.50 grams in 90 percent silver and 10 percent copper, struck at 17.9 millimeters with a reeded edge. Heavy pocket use and later silver meltings thinned the survivor pool, leaving the date scarce in mid-circulated grades and a condition rarity above About Uncirculated.

Authentication begins with the basic specifications: a calibrated scale should read 2.50 grams, calipers should confirm a 17.9 millimeter diameter, and the reeded edge should show uniform vertical reeds with no filed seam. The standard fake pathway is an added mintmark, where a counterfeiter files or solders an S onto a common 1913 Philadelphia coin to chase the Semi-Key premium. Under magnification the suspect S should be checked for surface continuity with the field, the correct San Francisco S font of the period, and proper position centered under the wreath bow; an added S often sits at the wrong height, leans off-axis, or shows a tooled boundary where the foot meets the field. Reference photographs from Feigenbaum and David Lawrence remain the most useful comparison set. Population data from Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC) confirms a thin certified pool above Extremely Fine, with Gem MS-65 examples genuinely rare.

For collectors building a Barber dime set, the 1913-S is a required Semi-Key alongside the 1896-S, 1901-S, and 1903-S that anchor the San Francisco rarity tier. Problem-free Good through Fine pieces turn up at major shows in the low to mid three figures, Extremely Fine coins step into the mid-hundreds, About Uncirculated pieces trade in the high hundreds, and Mint State examples push past $900, with choice MS-63 coins reaching well above $1,300. The prudent approach is to stick to certified coins and avoid raw pieces without a written authenticity guarantee. For broader context on design history and date-by-date rarity, see the Barber Dimes (Liberty Head) series history.