This coin is extremely difficult to locate. It was purchased raw from an auction house in Austrailia and graded by PCGS in 2011. Total PCGS AU population is 28 with only 8 in AU 58. The BCCS rating is R5.
Though the 1903-S Dime has the smallest mintage -- by far -- of any of the 1903 Dimes (Philadelphia, Denver, and San Francisco), more 1903-S Dimes have been certified by PCGS than either the 1903 or the 1903-O. This may not be indicative of relative rarity, but may simply be a reflection of the higher value of the 1903-S.
Numerous, high-grade examples of the 1903-S Dime have survived, usually in MS64. At the Gem level, MS65 and MS66 examples appear to have survived in relatively equal numbers. The best example is a PCGS MS67, formerly of the Bob Simpson Collection, which ranks as one of the finest (if not THE finest) Barber Dime collections ever assembled.
The strike quality of the 1903-S Dime is excellent. Luster ranges from prooflike to a hard brilliance to a soft, creamy surface.
Bob R. Simpson Collection - Legend Rare Coin Auctions 12/2014:94, $17,037.50
Heritage 2/2005:6286 - Lily Nicole Collection - Heritage 4/2015:3934, $6,462.50