An interesting type of error is the broadstrike. Broadstrikes are coins that have been struck while the coin planchet is totally or partially unconstrained by the collar. The collar is the third major part of the coining process, and normally…

Australian error coins are a fairly popular collecting theme among a lot of collectors. Among the most unusual of Australian error coins is the brockage. A brockage is what results when a pressed coin fails to exit the press when…

There are a few different types of clipped planchets which we have spoken about before. These are often called clips, edge bites or bitten edge coins. During the coin manufacturing process blanks are punched from a long metal strip. The…

In a previous entry about brockages I discussed briefly how they were formed. I also mentioned that Australian pre-decimal brockage coins can be hard to come by. Fortunately I’ve been able to obtain an image of a nice example of…

The so called coin cud or die chip error coin happens when a part of one of the dies that strikes the coin actually breaks off. When this broken die strikes a coin the result is a new raised feature…

A master list of articles we’ve written about error coins, misstrikes, wrongly minted coins and coin press mishaps. Research your own dodgy looking coin and learn if it’s really a genuine coin error or PMD -damage after the coin was…

Compared with how many coins are minted in a production run, the rate of error is quite small. The coin shown is a very interesting example of an error coin. On first glance it looks like it may have been…

Over on our Facebook page we usually put some coin photos up on a Friday afternoon to get our readers relaxing into the weekend. This week, to take the pressure off the working week we’ve decided to focus on striking…

The United States Mint has produced one of the most spectacular error coins that is available to collectors of US error coins. A dime (valued at 10 cents) was struck on a zinc coated nail either by sheer accidental contamination…

Australian coin errors are among the most desirable in the world and prices realised show how popular these mis-strikes are to collectors. For modern errors especially, you can only wonder if the Royal Australian Mint are so strict with their quality…