Acquisition position
Current all in cost
340.0 SEK
Current bid or estimate300.0 SEK
Modelled discount59.2%
Liquidity score80%
Karl Himmelstoss · Ceramics and porcelain · Auktionsfirma Kenneth Svensson i Kalmar
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Höjd 11 cm, bredd 15 cm. Djupstämplad.
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 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
Karl Koepping (German, 1848-1914) after Rembrandt van Rijn (Dutch, 1606-1669)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Schrag American, born Germany, 1912-1995
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Wirsum American, 1939-2021
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Schrag American, born Germany, 1912-1995
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Schrag (American, 1912-1995, born Germany) printed by Joe Zirker (American, born 1924) published by Tamarind Lithography Workshop (American, founded 1960)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Wirsum American, 1939-2021
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Hofer German, 1878-1955
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Koehler (American, born 1913) Victor Ancona (American, 1912-1998)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoLudwig Karl Hilberseimer American, born Germany, 1885–1967
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Schmidt-Rottluff German, 1884–1976
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoLudwig Karl Hilberseimer American, born Germany, 1885-1967
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoKarl Hofer German, 1878-1955
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 11765 | 56% | 600.0 SEK | identity 67%, material 45%, size 62%, title 75%, factory marks 45% |
| 11897 | 56% | 800.0 SEK | identity 67%, material 45%, size 62%, title 75%, factory marks 45% |
| 12423 | 56% | 500.0 SEK | identity 67%, material 45%, size 62%, title 75%, factory marks 45% |
| 11298 | 56% | 900.0 SEK | identity 67%, material 45%, size 62%, title 75%, factory marks 45% |
| 12242 | 54% | 12500.0 SEK | identity 69%, material 45%, size 62%, title 42%, factory marks 45% |
| 4652 | 52% | 2000.0 SEK | identity 60%, material 45%, size 62%, title 52%, factory marks 45% |
| 16096 | 52% | 1000.0 SEK | identity 60%, material 45%, size 62%, title 47%, factory marks 45% |
| 10345 | 52% | 3000.0 SEK | identity 60%, material 45%, size 62%, title 48%, 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.