New Zealand variety collectors have been amassing the 2004 10 cent with a peculiar double rim thinking it was more simply a coin with a misaligned obverse die (MAD). With more thought and some measurements taken it’s been discovered that…

As a collector of error coins in particular errors of Australian coins there’s one type of error that constantly eludes me. This article features 2 different, but very similar New Zealand 50c coins of this error type. This coin error…

Let’s begin with two of the most spectacular coin errors and one of the most off centre error coin types that you’ll find. Any further off centre and you’d just have a blank planchet!! These two coins above and below…

We’ve spoken before about broadstrike error coins. There can be varying degrees of a broadstruck coin and as the size of the error increases and there begins to be missing elements of the coin then it becomes an off center…

There are 3 different dies that strike a coin blank to make a coin. The obverse (heads) side, the reverse (tails) side and the collar die. The reverse die usually on the bottom is recessed below the collar. The collar…

Error coins are eagerly hunted by collectors and now with more and more coloured coins being minted for circulation by the Royal Australian Mint we’re seeing new types of error coins that never before existed. This is the more easily…

An interesting (but not particularly scarce) type of coin error is the lamination flaw or planchet flaw error. It is also sometimes known as a peel error. A lamination or planchet flaw or peel coin error occurs when there is…

Since the introduction of the one dollar coin in 1984 a weak spot on reverse die for the the 5 mob of roos design has resulted in a variety of the dollar coins which you might find in your change.…

Another type of out of collar coin error is the ‘ramstrike’ or ‘high lip’ coin error. This sort of error occurs when the planchet is partially off-centre or out of alignment when the coin striking process starts. As the hammer…