Acquisition position
Carl Larsson · Prints and works on paper · Uppsala Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Etsning. I. 13,5 x 10,5 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 37% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 37% · 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
Vincent van Gogh
0% similarityCC0 when isPublicDomain is trueThe Met Open AccessVincent van Gogh
0% similarityCC0 when isPublicDomain is trueArt Institute of ChicagoCecilia Edefalk Swedish, born 1954
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Märta Måås-Fjetterström (Swedish, 1873–1941) Executed by Barbro Nilsson (Swedish, 1899–1993) and the Märta Måås-Fjetterström Workshop Sweden, Båstad
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 498 | 55% | 300.0 SEK | identity 74%, material 45%, size 62%, title 44%, edition 45% |
| 4631 | 54% | 800.0 SEK | identity 70%, material 45%, size 62%, title 41%, edition 45% |
| 5296 | 53% | 600.0 SEK | identity 64%, material 45%, size 62%, title 49%, edition 45% |
| 11976 | 53% | 5000.0 SEK | identity 64%, material 45%, size 62%, title 49%, edition 45% |
| 22871 | 52% | 500.0 SEK | identity 67%, material 45%, size 62%, title 34%, edition 45% |
| 9954 | 52% | 815.0 SEK | identity 64%, material 45%, size 62%, title 41%, edition 45% |
| 22229 | 52% | 1600.0 SEK | identity 67%, material 45%, size 62%, title 32%, edition 45% |
| 8167 | 52% | 300.0 SEK | identity 64%, material 45%, size 62%, title 41%, edition 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.