1909-S

The 1909-S Barber dime came out of the San Francisco Mint with a business-strike mintage of exactly 1,000,000 pieces, placing it in the sub-million range that specialists track within the 1892 to 1916 run. Alongside the 954,000-piece 1909-D and the 1913-S and 1915-S, the 1909-S sits in borderline Semi-Key territory. Output stayed well below the 10.24 million Philadelphia dimes struck the same year, and the gap shows up plainly in surviving population pools. The "S" mintmark sits below the wreath bow on the reverse. Charles E. Barber designed both sides, and by 1909 his Liberty Head dime had been in continuous production for seventeen years.

Strike quality on the 1909-S often runs soft, a characteristic San Francisco shared with several branch issues of the period. Watch for definition on the upper laurel leaves, the bow knot on the reverse, and the LIBERTY headband on the obverse. A coin showing all seven letters of LIBERTY fully formed commands a clear premium over the typical survivor at the same numerical grade. Authentication centers on the added-S threat. Because the 1909 Philadelphia issue is roughly ten times more common and trades for a fraction of the 1909-S price, the standard counterfeit pathway is a fake S mintmark filed, soldered, or affixed onto a 1909-P reverse. Examine the mintmark under at least 10x magnification: the period San Francisco S has clean curl terminals that meet the field without a seam. An altered mintmark often shows a parting line, an off-axis tilt, or a surface texture that does not match the surrounding field. Confirm weight at 2.50 grams and diameter at 17.9 millimeters. Coins certified by PCGS (Professional Coin Grading Service) or NGC (Numismatic Guaranty Company) bypass this concern.

For collectors, the 1909-S sits in productive territory. Good through Fine examples trade at clear premiums over common dates but remain reachable at major shows. Very Fine and Extremely Fine pieces require more patience, and choice Mint State survivors are condition rarities that climb sharply at gem levels. Date-and-mintmark set builders should plan to spend more time hunting a 1909-S than the mintage suggests, since fully struck and original-surface coins disappear into long-term collections. For broader context on design history and date-by-date rarity, see the Barber Dimes (Liberty Head) series history.