Coin and Paper Money Collecting/Expert Profile

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I can answer most questions about coin identification, grading and counterfeit detection. I can answer questions about US and Foreign coins & currency, ancient coins too.

Experience in the area

30 years experience as a collector and dealer in rare coins ANA Numismatic Scholar Owner of New England Coin Exchange I have been buying and selling coins in RI for over 30 years


Professional Coin Grading Service - PCGS National Guaranty Corporation - NGC American Numismatic Association - ANA


Cityscape Merchant Circle Numismatic News eBay Providence Journal Bulletin All Experts


Numismatic Scholar Certificate - American Numismatic Association BSEE - New England Institute of Electronics

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
max12/07/16101010 Thank you so much, it was .....
Kris06/11/16101010Thank you for your answer. Now it .....
Terry06/01/16101010Thanks. You confirmed my hunch!

Recent Answers from David McConaghy

2016-12-07 strange penny:

Hello Max,    What you have is an altered coin - this was not done at the mint. We can guess that the person who did this was trying to create some type of novelty coin or they were practicing jewelry

2016-10-21 Foreign coin:

Hello Crystal,    In my opinion this is a replica coin. The patina appears to be too shiny and it has no salt water effect. Typically these coins would have a pitted surface not a smooth and shiny surface

2016-10-20 About a 1943 quarter:

Hello Alberto,    When a coin has this type of writing we call it graffiti - this was done to coins on a regular basis - sometimes just initials or names and sometimes funny sayings.    It hurts the value

2016-10-10 One Canadian cent:

Hello,    I believe that Canada stopped making pennies in 2012 but you should ask someone who lives there.     From my understanding you can still use them in commerce but they are being phased out. The

2016-09-17 2005 buffalo quarter:

Hello,    It sounds like you are talking about the orientation of the images on the front and back relative to each other. US coins are made with coin alignment or coin orientation. This means if you hold


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