Odd 20p

[Tony 4]

Just wondering if anyone can help trying to figure out of mint report or just worm 

[Chris Perkins]

20 hours ago, Tony 4 said:

Just wondering if anyone can help trying to figure out of mint report or just worm 

 

If mint 'error' or just worn?

I think it's probably been weakly struck with the result that some detail is not properly formed.

[Rob]

It will either be the dies blocked with grease, or more likely given the weakness to both sides, a weak strike or a non-uniform/standard thickness flan. Weight?