Acquisition position
Current all in cost
601.0 SEK
Current bid or estimate601.0 SEK
Modelled discount30.0%
Liquidity score76%
Monica Backström · Art glass · Helsingborgs Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Ca 10 x 20 cm.
Identity resolution
Ranked from independent evidence. Confirmation or rejection becomes controlled training data.
Visual 0% · Name 42% · Marks 25% · Material 40%
26% combined confidenceVisual 0% · Name 42% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 40% · 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 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 37% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 37% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 33% · 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
Alfred Leslie American, 1927-2023
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoAlgimantas Kezys American, born Lithuania, 1928-2015
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 ChicagoDonald Roberts (American, 1923-2015) printed by Donald Roberts published by Tamarind Lithography Workshop (American, founded 1960)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoHiratsuka Un'ichi (Japanese, 1895-1997)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoEd Ruscha American, born 1937
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoFrank O. Gehry American, born Canada 1929-2025
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJoel Sternfeld American, born 1944
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoAngela Kelly American, born Northern Ireland 1950
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJoel Sternfeld American, born 1944
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoItalian; possibly Venice
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoChristopher Williams American, born 1956
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 15993 | 68% | 350.0 SEK | identity 100%, material 45%, size 62%, title 93%, factory marks 45% |
| 4251 | 68% | 8600.0 SEK | identity 100%, material 45%, size 62%, title 90%, factory marks 45% |
| 7616 | 68% | 200.0 SEK | identity 100%, material 45%, size 62%, title 90%, factory marks 45% |
| 8615 | 68% | 850.0 SEK | identity 100%, material 45%, size 62%, title 90%, factory marks 45% |
| 9489 | 68% | 654.0 SEK | identity 100%, material 45%, size 62%, title 85%, factory marks 45% |
| 7776 | 68% | 800.0 SEK | identity 100%, material 45%, size 62%, title 84%, factory marks 45% |
| 15369 | 68% | 450.0 SEK | identity 100%, material 45%, size 62%, title 80%, factory marks 45% |
| 21297 | 67% | 700.0 SEK | identity 100%, material 45%, size 62%, title 78%, 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.