Excess of metal

Hello friends,
I have this 2006 commemorative 2€ German coin with an apparent excess of metal in the mintmark D. I'd like to know your opinion and if it is or not a strange case.

Thanks in advance.

Metal broke off from a coin before and filled in the "D" Here in the US we call it a filled D It happens to numbers too. Here is a US 1 cent with the upper part of the 8 filled in

Some what common, some people collect

Hi,

no, it's not strange, it happens quite often, here is an exceptional example from Finland


Ole

Indeed, it is the center part of the die that dissapeared with the use of that die.