Also this week, readers learned of a newly discovered half eagle variety, and Treasury secretary Steve Mnuchin's cleaned-up signature for Federal Reserve notes.

The design that lost out to the underwhelming, critically assailed image of Susan B. Anthony has new life, courtesy of a modern minter.

Third-party grading services generally group Mint State U.S. copper coins into three color categories: red, red and brown, and brown. Some are tough to peg.