Philip IV or Charles II, (1)665, Assayer E (T.I.M. 3845 (II)), two dates, one of them with three digits, and the assayer initial faintly visible twice on the reverse; fine

Details
Philip IV or Charles II, (1)665, Assayer E (T.I.M. 3845 (II)), two dates, one of them with three digits, and the assayer initial faintly visible twice on the reverse; fine
Further details
Despite its thin flan (11.1g.), this specimen contains enough information to make it intriguing. Because Philip IV died in 1665, and Charles II succeeded him that same year, there is no way to tell for which monarch Eregueta (Assayer E) produced this coin.