@prefix nm: . @prefix rdf: . @prefix skos: . @prefix foaf: . @prefix nmo: . @prefix void: . @prefix dcterms: . rdf:type ; skos:prefLabel "GIC 810: denominational mark Ϛ "@en; skos:definition "Countermark: denominational mark Ϛ – as defined in C. Howgego, Greek Imperial Countermarks. Studies in the Provincial Coinage of the Roman Empire (London, 1985): no. 810 "@en; void:inDataset ;