platinamerken

Les poinçons français d'or, d'argent, de platine de 1275 à nos joursschema:CreativeWork Nederlands' responsibility marks since 1797 : a review of the Dutch makers' marks, importers's marks, assay office identification marks, assayers' marks and trade assayer's marks for gold, silver and platinum since the introduction of the Law of the 19th Brumaire year (9-11-1797)schema:CreativeWork Nederlands' responsibility marks since 1797 : a review of the Netherlands makers' marks, importers's marks, assay office identification marks, assayers' marks and trade assayer's marks for gold, silver and platinum since the introduction of the Law of the 19th Brumaire year (9-11-1797)schema:CreativeWork Nederlandse verantwoordelijkheidstekens vanaf 1797schema:CreativeWork