1. Numismatic Guaranty Corporation (NGC):
Link: https://www.ngccoin.com/
NGC is a leading third-party coin grading service that provides valuable information and resources on coin collecting and authentication. Their website features a vast database of coins, coin images, and articles about numismatics.
2. Professional Coin Grading Service (PCGS):
Link: https://www.pcgs.com/
PCGS is another renowned third-party coin grading service that offers an extensive online reference for coins. Their website includes high-resolution coin images, grading guides, and educational content.
3. American Numismatic Association (ANA):
Link: https://www.money.org/
The American Numismatic Association is a non-profit organization dedicated to promoting numismatics as a hobby. Their website provides access to a wealth of numismatic knowledge through articles, publications, and educational resources.
4. CoinWeek:
Link: https://coinweek.com/
CoinWeek is a popular online news and information resource for coin collectors and enthusiasts. The site features breaking news, market analyses, coin collecting guides, and exclusive interviews with experts.
5. Numista:
Link: https://en.numista.com/
Numista is a collaborative numismatic database that contains an extensive catalog of coins from around the world. Users can browse through coin listings, historical information, and images.
6. CoinQuest:
Link: https://www.coinquest.com/
CoinQuest is another resource for coin collectors, offering a wide variety of information on coin values, coin identification, and numismatic history.
7. The Royal Mint:
Link: https://www.royalmint.com/
If you're interested in British coins and coinage, The Royal Mint's website provides detailed information on UK coins, their history, and the minting process.
8. Coin Collector:
Link: https://www.coincollector.co.uk/
Coin Collector is a UK-based website with news, articles, and guides related to coin collecting, including historical insights and tips for beginners.
9. International Numismatic Society:
Link: http://www.internumismatics.org/
The International Numismatic Society is a non-profit organization with a focus on the study of numismatics. Their website offers access to学术期刊, research papers, and conference proceedings.
10. Krause Publications:
Link: https://www.krausebooks.com/
Krause Publications is a leading publisher of numismatic books, magazines, and catalogs. Their website provides a platform to purchase these resources and stay updated on the latest releases.
Remember, when conducting research on old coins, it's important to consult multiple reputable sources to get a comprehensive understanding of the coins and their value.