1945 S Micro S Full Band Mercury Dime The 1945 S dime is the only one known to have the Micro S mintmark appear on the reverse side of the coin.
In addition, dimes from this year struck in San Francisco (as this one was) tend to be poorly struck so those with full bands are rare.
1860 Liberty Seated Dime In 1860, the words "United States of America" moved to the front of the dime and replaced the stars.
While this change was made to coins minted in New Orleans (O coins) and Philadelphia (no mint mark), coins made in San Francisco remained the same.
1968 No S Roosevelt Dime Proof This is the first proof coin that was mistakenly struck without the mint mark, and only about 12 such coins are known to exist.
1844 Seated Liberty Dime While this coin has a relatively low mintage (only 72,500), there’s no significant shortage of this coin in worn condition.
The error in this case is a double die obverse, where the image of George Washington is doubled, creating a distinct and unusual appearance.