Denier - Charles II Blois mint

This denier belongs to the monetary reform imposed by the Edict of Pîtres in 864, by which Charles the Bald standardized coinage across the kingdom, restricting minting rights to a defined list of royal and ecclesiastical establishments. Blois was among the authorized sites. The reform was partly a fiscal response to Viking pressure — controlling coin production meant controlling the silver supply needed to fund tribute payments and military organization.

The Prou reference range spanning multiple varieties reflects genuine die proliferation across the eleven-year window, not collector splitting.