A split planchet coin error occurs when there is a weakness or lamination defect in the metal blank. During the preparation of the planchet strip foreign materials such as gas, dirt or grease may become trapped below the metal surface.…

Have you ever seen a die cap, bottle cap or bottle top coin error? They are one of the rarest coin errors typically because such an error should never leave the manufacturing mint. This Australian 5c bottle cap error started…

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…