Looking into the breakup of a threepenny piece die at the Aberystwyth mint in the reign of Charles I, and the relevance in the dating of die sequences.
Insights into a die breakup for a Charles I Aberystwyth threepence – D.I. Greenhagh
Looking into the breakup of a threepenny piece die at the Aberystwyth mint in the reign of Charles I, and the relevance in the dating of die sequences.
BNS Research Blog 