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- Stockholm — Swedish Assay System
* Assay office
Stockholm — Swedish Assay System: hallmarks, history, and town mark
Swedish hallmarking dates to medieval guild marks. Modern system uses CCM (Vienna Convention) marks plus the three-crowns 'Tre Kronor' national mark. Sweden signed Vienna Convention 1972.
Published May 30, 2026
Quick facts
- Operator
- Swedac
- Location
- Stockholm, Sweden
- Founded
- 1485
- Status
- Active
- Town mark
- Three crowns (Tre Kronor) — historical Swedish hallmark
About the Stockholm — Swedish Assay System
Swedish hallmarking dates to medieval guild marks. Modern system uses CCM (Vienna Convention) marks plus the three-crowns 'Tre Kronor' national mark. Sweden signed Vienna Convention 1972.
The town mark
The Stockholm — Swedish Assay System strikes a distinctive symbol — Three crowns (Tre Kronor) — historical Swedish hallmark. This town mark identifies where a piece was assayed, so spotting it on a ring, chain, or piece of silverware tells you which office tested and guaranteed its metal content.
Visit / official record
Official site: https://www.swedac.se/
Sources
- Vienna Convention on Control of Articles of Precious Metals
* Frequently asked
FAQ
- Q. Where is the Stockholm — Swedish Assay System?
- A. It is based in Stockholm, Sweden. It is run by Swedac.
- Q. Is the Stockholm — Swedish Assay System still operating?
- A. Yes. The Stockholm — Swedish Assay System, founded in 1485, is still assaying and hallmarking precious metal today.
- Q. What hallmark symbol does the Stockholm — Swedish Assay System use?
- A. Its town mark is three crowns (tre kronor) — historical swedish hallmark. That symbol identifies the office where a piece was tested for purity, so you can use it to trace where the item was assayed.
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