Edward Silver Penny

I would really like some help with identifying which Edward this coin belongs to please.  I believe it’s a sliver penny

The ‘N’s’ on the reverse and obverse are Roman and I think the crown is bifoliate, but I’m not 100% sure - so much to learn!
 

Silver

approx 18mm dia

1.6g

Please take a look at reff Att your Coin looks like a type 10ab,1,2,3