Tracing metallurgical links and silver provenance in Balkan coinage (5th -1st centuries BCE)

Local types of coinage testify to the emerging use of silver in the Balkan interior, possibly related to abundant ore deposits in the region. Here, we present Pb isotope data for silver coins minted by local tribes and settlements (anepigraphic coins attributed to the Derrones/Laeaei, Damastion, Pelagia, Kings of Paeonia) between the 5th and 3rd centuries BCE. For comparison, we analysed coinage of the potential Greek emporia Dyrrhachium and Apollonia for their main element and Pb-Ag isotope compositions. Statistical data evaluation demonstrates close material connections between coins from the Balkan interior and identify a predominantly local raw material provenance. The majority of Damastion’s issues defines a tight cluster fitting Strabo’s (VII.7.8) account that the settlement possessed nearby silver mines in the Balkan interior. Novobërdë/Novo Brdo (Kosovo) can be plausibly hypothesised among the available reference data to have been one of the main ore districts supplying the mint. Mixing is evident for coins from the Kings of Paeonia and coinage attributed to the Derrones/Laeaei. Virtually identical end-members suggest that Paeonian regal coinage recycled tribal issues with contribution of metal obtained from Damastion’s hypothesised mines. Contemporaneous coinage struck by Dyrrhachium as well as end-members calculated for Thasos and the Macedon kingdom (Albarede et al. in Bullion mixtures in silver coinage from ancient Greece and Egypt, J Archaeol Sci 162:105918, 2024a) signal metal sourced from the Balkans, presumably the Macedonian/Paeonian border area. Comparison of data from Greek city-states and coinage issued by Apollonia and Dyrrhachium for the Romans demonstrates a change in the type and origin of raw materials and bullion composition, indicating a shift in monetary customs and possibly metal production technology.