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…

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…

A clipped planchet or edge bite error coin occurs when a coin is struck on an incomplete planchet. Coin blanks are punched out from strips of metal using a high-speed punch. Sometimes the strip isn’t pushed along far enough after…

In Part 1 of the Split Planchet Coin Errors series of articles brief mention was made of the so called ‘clamshell’ partially split planchet. This sort of coin error, seen here, happens when there is a weakness in the metal…

In the previous entry about Split Planchet Errors I mentioned that there were 2 main types of split planchet error coins. Those where the planchet split those coins that were struck and then the coin split. Shown here are examples…

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.…