Possible mule 1977 crown coin

[British coins]

Hi everybody,

strolling through a large lot of coins the other night from house clearance. Came accross a 1977 crown coin that seems to have a tiny crown imprinted beneath the horse. Not quite center between legs. Closer to the back legs. 

 

Has there ever been another report like this. I thought it to be scratch at first then closer I looked especially the angled top looks like a crown. It’s good finish to, delibaretly done. You can see the workmanship in especially in pictures 2/3/4. 100% a crown. 

 

Any opiniouns on this would be great...

[Just Bob]

I am going to offer an alternative opinion. It looks like edge reeding, as if the edge of another coin struck, at an angle, either this coin (if the marks are incuse) or the die (if the marks are raised). If I were as versed in photo manipulation as some other members, I could show you what I mean.

Just my

[British coins]

Thanks for comment, 

it would have to be struck very hardly with another coins edge reeding. It’s cupro/nickel so not soft like silver. 

To me still looks deliberate maybe somebody has etched on there. 

Im just curious too anyone else’s  opinion.