Acquisition position
Current all in cost
600.0 SEK
Current bid or estimate300.0 SEK
Modelled discount43.8%
Liquidity score80%
Birch Nielsen · Ceramics and porcelain · Helsingborgs Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Höjd och diameter ca 14 cm, vasöppning ca 7,5 x 1,5-3 cm.
Identity resolution
Ranked from independent evidence. Confirmation or rejection becomes controlled training data.
Visual 0% · Name 86% · Marks 25% · Material 40%
33% combined confidenceVisual 0% · Name 86% · Marks 25% · Material 40%
33% combined confidenceVisual 0% · Name 86% · Marks 25% · Material 40%
33% combined confidenceVisual 0% · Name 40% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 39% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 38% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 37% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceClosed deal feedback
Enter the verified hammer price after the auction closes. Only verified outcomes become calibration data.
Learning guardrail
Global research evidence
Thomas Birch American, born England, 1779–1851
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKay Rasmus Nielsen Danish, 1886-1957
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoArtist unknown (American, 19th century) Boston
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGeorges Seurat (French, 1859–1891)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoPablo Picasso Spanish, active France, 1881–1973
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoVincent van Gogh (Dutch, 1853–1890)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoSylvia Birch Halperin American, 1931-1984
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoSylvia Birch Halperin American, 1931-1984
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoHenri de Toulouse-Lautrec (French, 1864–1901)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoPaul Cezanne (French, 1839–1906)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Samuel A. Marx American, 1885–1964 Manufactured by William Quigley Co. American, 20th century Chicago
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoCharles Eames (American, 1907–1978) Ray Eames (American, 1912–1988) Made by Herman Miller Furniture Co. Zeeland, Michigan, founded 1905 (note: Herman Miller Furniture Co. became Herman Miller Inc. in 1960)
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 5936 | 53% | 200.0 SEK | identity 62%, material 45%, size 62%, title 48%, factory marks 45% |
| 2698 | 52% | 1001.0 SEK | identity 62%, material 45%, size 62%, title 42%, factory marks 45% |
| 3771 | 50% | 600.0 SEK | identity 56%, material 45%, size 62%, title 42%, factory marks 45% |
| 4276 | 50% | 650.0 SEK | identity 52%, material 45%, size 62%, title 56%, factory marks 45% |
| 4265 | 50% | 950.0 SEK | identity 54%, material 45%, size 62%, title 49%, factory marks 45% |
| 6526 | 50% | 850.0 SEK | identity 56%, material 45%, size 62%, title 39%, factory marks 45% |
| 5732 | 50% | 200.0 SEK | identity 54%, material 45%, size 62%, title 46%, factory marks 45% |
| 10838 | 50% | 200.0 SEK | identity 45%, material 45%, size 62%, title 74%, factory marks 45% |
Automatic signature module
The local engine detects and isolates candidate regions, searches the trusted mark library and runs conservative signature forensics. Optional AI interprets unreadable regions and creates research queries without changing the forensic verdict.
The module runs during normal analysis when a local image is available.
Marks laboratory
110 independent methods generate cleanup variants, stroke and symbol descriptors, library matches, trust controls and conflict warnings.
Signature forensics
This does not declare a signature genuine. It measures fit against a multi-source reference set, confusing signers and natural variation.
Run mark matching first, then compare the questioned signature against a sufficiently broad trusted reference set.