Æ Halfpenny token, undated. 28.8mm.  JOHN OF GAUNT DUKE OF LANCASTER. His draped bust left.  R. HIBERNIA. Hibernia seated left holding harp, oak sprig in exergue.  Edge:  CURRENT EVERY WHERE DH 76. VF

The mark on his nose is a die flaw, similarly the reverse has a die flaw which is present on all tokens of this issue to a greater or lesser extent.

British Tokens 18th Century   Coins and tokens of Ireland  Conders.