Common control mark


The articles of precious metals marked under the Convention on the Control and Marking of Articles of Precious Metals (Vienna Convention) may be sold in national territory.


The Common Control Mark (CCM), or Convention Mark consists of an image of a pair of scales and a number, in Arabic numerals, expressed as thousandths, indicating the precious metal fineness, in a perimeter frame indicating the type of precious metal.




The Convention marking system consists of affixing the following marks:

  • Sponsor’s Mark;
  • Assay Office Mark;
  • Common Control Mark (CCM);
  • Fineness number, in Arabic numerals.


Convention Signatory States:

Austria, Latvia, Cyprus, Lithuania, Croatia, Norway, Denmark, Poland, Slovenia, Portugal, Finland, United Kingdom, Netherlands, Czech Republic, Hungary, Slovakia, Ireland, Sweden, Israel, Switzerland, Serbia.


Official Convention Website: