Acquisition position
Current all in cost
425.0 SEK
Current bid or estimate300.0 SEK
Modelled discount73.1%
Liquidity score82%
Martin Johan Tengberg · Paintings · Björnssons Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Bildmått: 44x53cm. Rammått: 62x71cm.
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 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 86% · Marks 25% · Material 40%
33% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
25% combined confidenceClosed deal feedback
Enter the verified hammer price after the auction closes. Only verified outcomes become calibration data.
Learning guardrail
Global research evidence
Johan Hagemeyer American, born Netherlands, 1884–1962
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 ChicagoMartin Lewis American, born Australia 1881-1962
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohan Barthold Jongkind (Dutch, 1819-1891)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMartin Puryear American, born 1941
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohan Hagemeyer American, born Netherlands, 1884–1962
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMartín de Soria (Spanish, active 1449–87)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohan Hagemeyer American, born Netherlands, 1884–1962
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohan Barthold Jongkind (Dutch, 1819-1891)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoAgnes Martin American, born Canada, 1912-2004
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMartin Schongauer German, c. 1430/50-1491
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohan Hagemeyer American, born Netherlands, 1884–1962
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 17861 | 62% | 3509.0 SEK | identity 75%, material 45%, size 62%, title 45% |
| 19889 | 57% | 5500.0 SEK | identity 61%, material 45%, size 62%, title 59% |
| 18215 | 57% | 1211.0 SEK | identity 55%, material 45%, size 62%, title 73% |
| 18979 | 56% | 9000.0 SEK | identity 56%, material 45%, size 62%, title 68% |
| 21669 | 56% | 600.0 SEK | identity 54%, material 45%, size 62%, title 69% |
| 19606 | 56% | 400.0 SEK | identity 45%, material 45%, size 62%, title 100% |
| 18173 | 55% | 5000.0 SEK | identity 57%, material 45%, size 62%, title 54% |
| 19041 | 55% | 1706.0 SEK | identity 57%, material 45%, size 62%, title 52% |
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.