Over the years we’ve seen a number of year 2000 20 cent coins that were struck incorrectly, usually they’ve been tilted or straight partial collar errors. Above you can see an image of one such coin that is a bit…

Above is an error coin that is an interesting combination of two error types. It’s a partial brockage, having been struck against another already struck coin, and it’s also been struck twice, making it a double struck error. Either of…

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…

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…