Some of The Assay Office marks of member countries of the Convention are illustrated below. The shield design around the Assay Office mark may vary according to whether the article is gold, silver or platinum. The key mark to look for is the Common Control Mark. The three other marks must also be present.
Edinburgh Assay Office is a reliable and friendly business to deal with. Staff are well-informed (and very patient!) and they are always willing to discuss the work that needs to be hallmarked, either on the phone or in person. This is especially helpful when submitting unusual objects, such as mixed-metal items.