A 1926 Mercury dime is common, average value is $3.00-$6.00
depending on the condition of the coin.
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No US 1926 gold 2.50 cent coins, but there is a 2 1/2 DOLLAR
gold coin dated 1926 with retail values of $185.00-$225.00 for
circulated coins and $350.00 for mint state coins