Acquisition position
Current all in cost
1220.85 SEK
Current bid or estimate500.0 SEK
Modelled discount0.0%
Liquidity score88%
Efva Attling · Jewelry · Södermanlands Auktionsverk
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Storlek 17,5/55 vikt 16,8 gram.
Identity resolution
Ranked from independent evidence. Confirmation or rejection becomes controlled training data.
Visual 0% · Name 40% · 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 36% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 26% · Marks 25% · Material 40%
23% combined confidenceClosed deal feedback
Enter the verified hammer price after the auction closes. Only verified outcomes become calibration data.
Learning guardrail
Global research evidence
Frank Piatek American, 1944-2026
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoHamanishi Katsunori Japanese, born 1949
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMary Ann Hollis (American, active c. 1820) United States, probably New England
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMary M. Wallace (active c. 1796) United States
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoEngland
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoMary Chadbourne Keith Norton (American, 1807-1890) United States, probably Maine, South Berwick
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoChancay Central coast, Peru
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGeorge Cruikshank (English, 1792-1878) George John Pinwell (English, 1842-1875) engraved by the Dalziel Brothers (English, 19th century) written by Charles Dickens (English, 1812-1870) published by G.W. Carleton & Co. (American, 19th century) printed by John F. Trow & Son (American, 19th century)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Professor Josef Hillerbrand (German, 1892–1981) Produced by Deutsche Werkstätten AG (Founded 1913) Germany, Dresden and Munich
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoEngland or France
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Bertha Honoré Palmer (American, 1850–1918) Belgium, Brussels
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoDesigned by Professor Josef Hillerbrand (German, 1892–1981) Produced by Deutsche Werkstätten GmbH. (Founded 1898) Germany
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 10311 | 64% | 7501.0 SEK | identity 100%, material 45%, size 62%, title 59%, hallmarks 45%, weight 62% |
| 7233 | 53% | 500.0 SEK | identity 61%, material 45%, size 62%, title 66%, hallmarks 45%, weight 62% |
| 19724 | 50% | 300.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
| 18867 | 50% | 300.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
| 17231 | 50% | 350.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
| 17367 | 50% | 300.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
| 16050 | 50% | 300.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
| 14620 | 50% | 350.0 SEK | identity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62% |
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.