How to identify foundry marks
Foundry marks identify where a bronze may have been cast, but they do not prove the sculpture is authentic by themselves. They must be checked with artist, edition, casting quality, patina, and provenance.
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Photograph the foundry mark in context, then capture the whole sculpture, base, underside, edition number, artist signature, plaque, patina, and condition.
Auction records are market evidence, not a final appraisal. Condition, authenticity, provenance, size, medium, edition, subject, and demand can materially change value.
Evidence checklist
- Photograph the whole object, close details, back, frame or base, signatures, labels, condition issues, and scale.
- Include medium, dimensions, provenance, receipts, certificates, gallery labels, and prior appraisal records.
- Show the evidence that could prove or disprove the first assumption: texture, paper, canvas, plate mark, edition, foundry mark, surface, or damage.
What changes the answer
- Foundry mark, artist signature, edition number, casting quality, patina, and documentation work together.
- Later casts, after-casts, reproductions, and decorative bronzes can complicate mark interpretation.
- Strong provenance can be more important than a mark alone.
Auction evidence from Appraisily's database
Auction records show how foundry and attribution language affects bronze value. These are market examples, not promises for your artwork.
| Category | Sale | Date | Lot | Realized | What it shows |
|---|---|---|---|---|---|
| Artist bronze | Hill Auction Gallery | Apr. 29, 2026 | Erte Twilight Figural Bronze Sculpture | USD 1,200 | Edition and casting details matter for artist bronzes. |
| Contemporary bronze | Hill Auction Gallery | Apr. 29, 2026 | Paul Braslow Paris Blue Bronze Sculpture | USD 700 | Artist name, casting, and condition need to be read together. |
| Bronze group lot | Hill Auction Gallery | Apr. 29, 2026 | Grand Tour and Art Deco Bronze Sculptures, three-piece lot | USD 225 | Group lots can be useful evidence but may not isolate one sculpture value. |
Condition and authenticity cautions
Do not deepen, polish, wax, or clean a foundry mark before review. Surface changes can hurt evidence.
Use a professional appraisal or authentication path when artist attribution, legal use, insurance, donation, or a significant sale is involved.
When the free screener is enough
Use the free screener for first-pass identification, condition review, and market direction before selling, donating, cleaning, reframing, or ordering a formal appraisal.
When to get a professional appraisal
Use a professional appraisal for insurance, estate, donation, legal, or higher-value sale decisions. See the professional sample report.
Related guides
Art, painting, and signature guides, Art painting guides, Free online art appraisal, Free art appraisal app, Artwork media types guide, How to identify artist signatures, How to identify bronze sculpture marks, Bronze sculpture marks identification, Value of old bronze sculptures.
FAQ
What does a foundry mark tell you?
It may identify the casting foundry, but authenticity still depends on artist, edition, provenance, casting quality, and condition.
Can reproductions have foundry marks?
Yes. Marks can appear on later casts or reproductions, so context matters.
What photos are best?
Full sculpture, base, underside, mark close-ups, signature, edition, patina, damage, and documentation.
Need a clearer art answer?
Upload photos. Appraisily identifies the artwork, checks real sales where available, and shows whether a free screen or professional report makes sense.
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