netherlands 1941 zinc 2 1/2 cents

Hi There

I have a wartime Netherlands 2 1/2 Cent 1941, which was a very common coin, however I noticed something on the coin which I wanted to find out if there were known die variety of this kind. I can't find anything online that speaks to this. 

On this coin there is a point under the C in CT as per pic below. On standard coins this doesn't appear, it's a flat field under the C. Is this a known variety?

Thanks 

IT happens when die slightly deteriorates and only a small part of the edged design gets off the die. It's not a real die variety. You can see the similar thing in the horizontal line of the 4 in date.

Thanks for the feedback