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ColeMone
ColeMone
In Depth
The Greenland Dollar, or when Denmark plagiarized a Spanish coin
Denmark didn't want to use the Pillar Dollar for its trade in Asia, so they plagiarized the Spanish Pillar Dollar. Here's how.
Numismatic History
These are the most important commemorative 2-euro coins
Coins
The first coin designed by an artificial intelligence
Numismatic History
These Albanian coins are underrated: the 1926 series
Numismatic History
Are PCGS holders airtight? No, and we know it thanks to a cricket
Numismatic History
The not so secret code in the euro coin rolls
Banknotes
What is and where to find the Pick Number of a banknote
The Euro
These are the most important commemorative 2-euro coins
To celebrate the 20th anniversary of the first commemorative €2 coin, we review the 7 most influential coins in the collection.
The not so secret code in the euro coin rolls
The euro coin rolls have a standardized code for the entire Eurozone. Let's see what it is and how it works.
Germany’s mint marks are A, D, F, G, and J. What about the other letters?
In the coins of Germany there is a letter: A, D, F, G, and J, the German mint marks. We see what they mean and how they were assigned.
This is what the Denmark euro coins would have looked like
Even though Denmark rejected the euro in 2004, it had their own coin designs ready in case they decided to adopt it. We take a look at them.
2002 Italy 2-Euro Coin: Here’s its Value
Find out how much the worth and value of the Italy 2002 2-euro coin is and why it's actually very low, especially compared to some eBay ads.
The non-selected designs for the common side of the Euro coins: what could have been, but wasn’t
In 1996, the European Commission launched a contest to select the design of Euro coins. They were 8 non-selected designs, 8 losers. They were these ones.
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In Depth
The Greenland Dollar, or when Denmark plagiarized a Spanish coin
Denmark didn't want to use the Pillar Dollar for its trade in Asia, so they plagiarized the Spanish Pillar Dollar. Here's how.
1933 Double Eagle (US), or how the most expensive coin in the world can send you to prison
September 2nd, 2022
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The 1933 Double Eagle is the most expensive coin in the world, and its story could be the plot of a Hollywood movie. Read it here.
Del Monte Note (US), or when a banana label ended up being legal tender
August 18th, 2022
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Both in numismatics and in notaphily there are errors...
1928 Auto Dollar (China): A deep dive into the first coin ever to portray a car
July 20th, 2022
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We take a deep dive in the story of the 1928 Auto Dollar from China, including a look into its full history, its value, and its design.
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More Articles
Basics
A numismatic slap
A reader gets excited about a purchase but ends up very disappointed, and with a few numismatic lessons learned.
Basics
What is and where to find the KM number of a coin
We go over what the KM number of a coin is, who decides it, why it is important to coin collecting, and how and where to find it.
Numismatic History
Germany’s mint marks are A, D, F, G, and J. What about the other letters?
In the coins of Germany there is a letter: A, D, F, G, and J, the German mint marks. We see what they mean and how they were assigned.
Basics
What the numbers in the little stars in the Spanish peseta coins mean
¿Trying to find out what the little numbers in the stars in Spanish peseta coins mean? Here you can read the answer to that question.
Numismatic History
The irony in the last coins of the Soviet Union
The last coins of the Soviet Union wanted to show progress and technological advancement. Instead, they serve as a reminder of its collapse.
Numismatic History
The coins of Edward VIII of England that actually circulated
I get asked what coins of Edward VIII of England actually circulated, so here's a quick list of the 13 coins and the error that did.
Basics
What is a mule coin, or hybrid coin? It’s this.
We take a look at what a mule coin (also known as a hybrid coin) is, with examples and a quick overview at how that error can be made.
Basics
What is ‘guilloché’ in a banknote? It’s this.
A look at something that everyone has held in their hands, but which very few people know the technical name of: the guilloché on a banknote.
Basics
What is a replacement note? It’s this.
An explanation of what is a replacement note, the different types of replacement notes, what they are used for, and examples.
Numismatic History
This is what the Denmark euro coins would have looked like
Even though Denmark rejected the euro in 2004, it had their own coin designs ready in case they decided to adopt it. We take a look at them.
Basics
What is the RIC number of a Roman coin? It’s this.
We take a look at what the RIC number (or code) of a Roman coin is, where to find it, who decides it, and where to buy the books.
Values
1995 2000 Pesetas coin (Spain): Here’s its value
Find out the value of the 1995 silver Spanish 2000 pesetas coin in all of its presentations: loose, in a plastic bag, or in coincard.
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