David Hall: The 1918-D Mercury dime is not rare in circulated grades but it is scarce in mint state condition. Full band gems are very rare and superb gems are among the rarest in the entire series. Approximately 70% to 80% of the mint state survivors do not have fully struck crossbands. While luster on mint state specimens can be excellent, strike is such a problem that in gem condition this is one of the key dates to the Mercury dime series and one of the silver condition rarities of the 20th century.
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