Vienna Convention on the Control and Marking of Articles of Precious Metals
Website: www.hallmarkingconvention.org
CIBJO Blue Book on Precious Metals
This can be downloaded from here: IAAO 17
Web Design – Julia Skupny, www.juliaskupny.com
Vienna Convention on the Control and Marking of Articles of Precious Metals
Website: www.hallmarkingconvention.org
CIBJO Blue Book on Precious Metals
This can be downloaded from here: IAAO 17
Web Design – Julia Skupny, www.juliaskupny.com