Use this to identify it: http://www.coins-of-the-uk.co.uk/pics/pen1.html For a definite answer swish will help you or moneyer
henry iv maybe?? the obverse legend almost looks like it begins HEN... plus the bust has a long neck and squared jaw, which is found on york mint pennies early in henry iv's reign. how much does it weigh?
it is possible that it could be a contemporary imitation. i believe you have a henry iv heavy coinage penny minted between 1399-1412 in york. the normal weight of a full flan coin is 1.16g.
if as swish says it is a forgery then it will be worth very little, i have looked at it very closely and cross referenced it, an it sure looks fake to me as the portrait is quite amateurish this is an example of a real coin obverse and you will see there is quite a difference................. the reverse is quite different also..................