China, Empire of 1 Cash - Yuanyou (Tongbao; Seal script; with dot; left?) [resuelto]

I read that the dot is on the top just above the square hole. However, I found this coin with a dot on the left. I run my finger nail and it feels it hits a higher patch there. Is there this variation of dot which is not recorded?

Hello 

No there is no variation know for this coin 

the dot is above the hole

It could be a mold error

The numista picture is not good for me 

I have add this in the comment section

The presentation photo may have a mold error the dot should be at the top in the middle and not on the top right

You have an example with the dot above in the file