Acquisition position
Current all in cost
341.59 SEK
Current bid or estimate300.0 SEK
Modelled discount55.7%
Liquidity score76%
Ulrica Hydman-Vallien · Art glass · Björnssons Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
" Tulipa ", skål, höjd 14,5 cm, diameter 21, 5 cm samt fat, diameter 33 cm, signerade.
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 45% · Marks 25% · Material 40%
26% combined confidenceVisual 0% · Name 42% · 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 38% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 37% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 33% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 32% · 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
Designed by Bertil Vallien Swedish, born 1938 Made by Kosta Boda Kosta, Småland, Sweden, founded 1742
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Vicke Lindstrand Swedish, 1904-1983 Kosta Glasbruk (now Kosta Boda) Kosta, Småland, Sweden, founded 1742
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoBarbara S. Spitz American, born 1926
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoLadislav Sutnar (Czech, 1897–1976)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Astrid Sampe (Swedish, 1909–2002) Sweden
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoWalter Shirlaw (American, 1838–1909)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGérard Edelinck (French, born Flanders, 1640-1707) after Hyacinthe Rigaud (French, 1659-1743)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJean-Baptiste-Camille Corot (French, 1796-1875) printed by Auguste Delâtre (French, 1822-1907) published by Cadart et Chavalier, Editeurs (French, 1801-1900)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoLawrence Carmichael Earle American, 1845-1921
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 ChicagoAdolphe Appian French, 1818-1898
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDavid Dalhoff Neal (American, 1838–1915)
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 5306 | 68% | 3000.0 SEK | identity 100%, material 45%, size 62%, title 91%, factory marks 45% |
| 20186 | 68% | 400.0 SEK | identity 100%, material 45%, size 62%, title 86%, factory marks 45% |
| 13279 | 68% | 650.0 SEK | identity 100%, material 45%, size 62%, title 86%, factory marks 45% |
| 13303 | 68% | 725.0 SEK | identity 100%, material 45%, size 62%, title 86%, factory marks 45% |
| 17849 | 68% | 500.0 SEK | identity 100%, material 45%, size 62%, title 85%, factory marks 45% |
| 17113 | 68% | 500.0 SEK | identity 100%, material 45%, size 62%, title 85%, factory marks 45% |
| 10911 | 68% | 850.0 SEK | identity 100%, material 45%, size 62%, title 86%, factory marks 45% |
| 403 | 68% | 653.0 SEK | identity 100%, material 45%, size 62%, title 86%, 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.