This article was published in the Australasian Coin and Banknote Magazine May 2015 and was written by the Australian Coin Collecting Blog.Subscribe here to CAB magazine. What is a split planchet error? A split planchet occurs when a coin splits…

Our last entry about the Australian 2000 $1 / 10 cent mule and the recent discovery of a new 20p mule coin error in the United Kingdom made us realise we hadn’t actually done an entry on the so called…

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…

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…

Roxbury Auction House held their auction #95 (find the catalogue here) on October 17 2015 and there were a few errors in the sale that are worth mentioning. All prices are net of commission so 20% should be added to…

We came across this halfpenny error coin and though we’d share the fascinating process of determining more about this coin. At first glance it looks like a Queen Elizabeth pre-decimal coin around the halfpenny size. Weighing in at 5.49g it’s…