Acquisition position
Current all in cost
700.0 SEK
Current bid or estimate557.0 SEK
Modelled discount39.1%
Liquidity score80%
Christian Thomsen · Ceramics and porcelain · Helsingborgs Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Nr 648 Höjd 17,5 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 49% · Marks 25% · Material 40%
27% combined confidenceVisual 0% · Name 45% · Marks 25% · Material 40%
26% combined confidenceVisual 0% · Name 42% · Marks 25% · Material 40%
26% combined confidenceVisual 0% · Name 42% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 42% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 41% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 40% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 39% · 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 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
Marc Chagall Born Vitebsk (formerly Russian Empire, now Belarus), 1887; died Saint-Paul, France, 1985
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGiovanni Benedetto Castiglione Italian, 1609-1664
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoFrancisco de Zurbarán (Spanish, 1598–1664)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoPierre Bonnard French, 1867–1947
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGuido Reni (Italian, 1575–1642)
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 ChicagoChristian Boltanski French, 1944-2021
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoBartolomeo di Giovanni (Italian, active c. 1465-1501)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoAntonio Maragliano (Italian, 1664–1741) Workshop of Antonio Maragliano (Italian, 1664–1741)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoRichard Scheibe German, 1879-1964
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoCecco del Caravaggio (Francesco Boneri; Italian, 1588/90–after 1620)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJacques de Baerze (Netherlandish, active before 1384–1399) Melchior Broederlam (Netherlandish, about 1355–about 1411)
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 22835 | 67% | 1100.0 SEK | identity 100%, material 45%, size 62%, title 93%, factory marks 45% |
| 18241 | 67% | 300.0 SEK | identity 100%, material 45%, size 62%, title 90%, factory marks 45% |
| 17956 | 67% | 600.0 SEK | identity 100%, material 45%, size 62%, title 89%, factory marks 45% |
| 11378 | 57% | 500.0 SEK | identity 71%, material 45%, size 62%, title 68%, factory marks 45% |
| 14119 | 56% | 3803.0 SEK | identity 71%, material 45%, size 62%, title 64%, factory marks 45% |
| 14384 | 51% | 355.0 SEK | identity 59%, material 45%, size 62%, title 45%, factory marks 45% |
| 22582 | 51% | 300.0 SEK | identity 59%, material 45%, size 62%, title 41%, factory marks 45% |
| 11565 | 51% | 401.0 SEK | identity 59%, material 45%, size 62%, title 42%, 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.