Proof Gold Coins – Mintage Figure Variance – While it is difficult to make sweeping generalizations about the survival rate of Proof United States gold coinage, some factors exist that help to determine the rarity of many issues. It is interesting to analyze these factors and apply them to the various denominations. For the most part, Proof gold coins have small mintage figures.   
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As I’ve been working on the updated third edition of my Charlotte book, I’ve had the chance to make some interesting observations regarding the rarity of Charlotte half eagles. The overall rarity of most Charlotte half eagles has changed. In nearly every instance, this has meant an increase in the total number known for a specific issue. As an example, I estimated in the second edition that 70-80 examples of the 1840-C half eagle existed.   
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