Obv: Druids head with W at truncation of neck, bordered by oak wreath, 20 acorns (10 each side). Rev: A cypher P M Co, 1790 below, ANGLESEY MINES PENNY around. Edge: Plain and rough, not in collar.
Good Extremely Fine and Choice brown.
William Williams was a button maker who struck a few genuine halfpennies for the Parys Mines Company.