Ron Guth:
Of the Dimes produced in 1902, the 1902-S is about midway between the 1902 and the 1902-O in terms of rarity. This gives collectors more opportunities to find nice, high-grade examples. For instance, the 1902-O Dime is extremely rare in MS66, but the 1902-S is not. For collectors who want only the very best, at least one MS67 1902-S Dime exists, whereas there are none of the 1902-O.
The strike quality of the 1902-S Dime is excellent. Luster ranges from brilliant to frosty, with an occasional prooflike example. Die striations (polishing lines left in the dies) show up from time to time on 1902-S Dimes. Some examples have toned very nicely and present exceptional eye appeal (see the image of the PCGS MS67+ above).