At that time the proportion of silver was to that of copper as 1 to 960. For as the Roman denarius was valued at ten ases, or ten pounds of copper, it was worth one hundred and twenty ounces of copper;
Orduan zilarraren eta kobrearen arteko proportzioa 960/1 zen; izan ere, erromatar denarioak hamar as edo kobrezko hamar libera balio zituelarik, kobrezko ehun eta hogei ontza balio zituen;