Question by Pens Fan: When did Credit Suisse start using assayers numbers on gold bars. I have a 20 gram(fortuna) bar without any.? Best answer: Answer by Supra1QI’m not sure this matters once it’s authenticated and you provide documentation associated with it’s purchase… Know better? Leave your own answer in the comments! [wprebay kw=”20+gram+credit+suisse+gold” num=”0″ […]