Edward I Penny?

The dots are raised, not lowered - that's just an optical illusion, caused by light from the scanner coming from the opposite direction. Just like the apparent doubling is no doubt also caused by the scanner.

I always find classifying the numerous varieties of Edward I pennies tricky. The one 10xloupe linked to is a different variety, because on there the letter "N" is always backwards. I looked this one up last night but had trouble pinning it down to a specific class.

the obverse legend reads edw r' angl dns hyb.

i think yours is class 3g.

I don't know why it is with English hammered pennies of this period. About 10% of the pictures I see of these coins I perceive them incuse, not relief. The easiest way I have of curing this problem is to turn the picture upside down, hard to do with a computer screen!