Generally speaking, when you see doubling on the date and Mint Mark it is MD. That is because a DDO is created when the die is made mechanically and the repunched mint mark happens when the MM is applied by hand. They happen at different times in the production cycle.
MD doesn't really increase the value collectors are willing to pay.
Words of encouragement are one of the major food groups. We need to consume them regularly to thrive and grow.
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