The GreatCollections Coin and Paper Money Glossary
This is a popular resource that explains hundreds of coin related terms, as well as terms relating to our coin auctions. Of course, if you have questions about anything, please do not hesitate to contact us.
Branch Mint (BM)
The "BM" designation on PCGS-graded coins highlights rare proofs struck at branch mints, a practice uncommon before 1968 when proof production was primarily at the Philadelphia Mint, emphasizing their historical significance and rarity.
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