Unusual 20 pence piece

Hi I'm trying to find out if this is a common thing.
I have not seen it before, its like little globules of metal left on the surface of the coin.
Can anyone shed any light on this.
Thanks.

propably PMD.
Or possible a fake (they exist)

Welcome to the site.
It is called a cud. Happens a lot on UK 5p and 20p coins especially (sometimes others).

https://en.wikipedia.org/wiki/Die_defect

https://www.thespruce.com/cud-error-on-coins-768438

Citeer: "ZacUK"​ It is called a cud. Happens a lot on UK 5p and 20p coins especially.
​
​https://en.wikipedia.org/wiki/Die_defect
​
​https://www.thespruce.com/cud-error-on-coins-768438

​thanks for the info!!!
That proofs I still have to learn a lot

In the last 20 years or so it appears quite often - here are some on eBay ...

Cud or Die Chip??
A die chip and a cud are both caused by the same thing - a piece missing from the die - and both have the same end result - a lump of raised metal on the coin. The difference lies in the size of that lump. Die chips are very small, cuds are bigger than chips. How much bigger ? Well, therein lies the subjectivity. And there is no definitive delineation. Yet others believe to be a cud it has to be on the edge.

Thank you guys.
Very interesting, I'll probably keep it then.
Thanks for the acceptance to your site.