- Jewelry Identifier
- Hallmarks
- THREE_WHEATSHEAVES
* assay-mark hallmark
The THREE_WHEATSHEAVES hallmark: meaning, purity & value
British assay office mark: three wheatsheaves (sometimes with a sword) indicates Chester Assay Office. Operated 1701-1962, then closed. Useful for dating earlier 20th-century British jewelry as a closed-office mark.
Published May 30, 2026
Quick facts
- Metal
- assay-mark
- Common regions
- UK-historic
Stamps that mean the same thing
This purity may be struck into jewelry as any of: THREE_WHEATSHEAVES / Chester wheatsheaves / CHESTER. The mark differs by country and era, but the metal content is identical.
What THREE_WHEATSHEAVES tells you
British assay office mark: three wheatsheaves (sometimes with a sword) indicates Chester Assay Office. Operated 1701-1962, then closed. Useful for dating earlier 20th-century British jewelry as a closed-office mark.
How to check it yourself
- Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
- Confirm the mark reads THREE_WHEATSHEAVES or an equivalent such as Chester wheatsheaves.
- Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
- For a binding result, have an assay office or gemological lab run an XRF purity test.
Sources
- Chester Assay Office historical records
* Frequently asked
FAQ
- Q. Is THREE_WHEATSHEAVES the same as Chester wheatsheaves?
- A. Yes. THREE_WHEATSHEAVES, Chester wheatsheaves, CHESTER all denote the same material — assay-mark. Different markets and eras stamp it differently, but the purity is identical.
- Q. How do I confirm a THREE_WHEATSHEAVES stamp is genuine?
- A. Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density, scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.
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