Acquisition position
Current all in cost
533.27 SEK
Current bid or estimate351.0 SEK
Modelled discount69.1%
Liquidity score80%
Irma Yourtstone · Ceramics and porcelain · Auktionshuset Thörner & Ek
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Ca. 25x19,5 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 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 42% · Marks 25% · Material 40%
25% combined confidenceVisual 0% · Name 41% · 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 36% · Marks 25% · Material 40%
24% combined confidenceVisual 0% · Name 34% · 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
Irma Boom (Dutch, born 1960) Edited by Nina Stritzler–Levine Published by Yale University Press
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom Dutch, born 1960 Edited by José Roca and Alejandro Martin Published by Bard Graduate Center: Decorative Arts, Design History, Material Culture
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom (Dutch, born 1960) Published by Slewe Gallery (Dutch, founded 1994)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom (Dutch, born 1960) Written by Jennifer Butler Published by Erasmus Publishing Ltd.
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom (Dutch, born 1960) Written by Ellen Gallagher in collaboration with Edgar Cleijne Edited by Hauser & Wirth London/Fruitmarket Gallery Edinburgh Published by Scalo Publishers
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom (Dutch, born 1960) Published by Lecturis (Dutch, founded 1922) and the Special Collections department of the University of Amsterdam
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom Dutch, born 1960 Edited by Nina Stritzler–Levine Published by Yale University Press
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom Dutch, born 1960
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoBruce Alonzo Goff American, 1904-1982 Delineated by Jack Chamberlin American, active 20th century
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGeorges Rouault (French, 1871-1958) edited by Ambroise Vollard (French, 1835-1939)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoWritten by Jennifer Butler Designed by Irma Boom (Dutch, born 1960) Published by Erasmus Publishing Ltd.
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoIrma Boom (Dutch, born 1960) Published by the Harvard Graduate School of Design
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 10579 | 51% | 2469.0 SEK | identity 54%, material 45%, size 62%, title 58%, factory marks 45% |
| 10499 | 51% | 800.0 SEK | identity 54%, material 45%, size 62%, title 57%, factory marks 45% |
| 10756 | 51% | 500.0 SEK | identity 54%, material 45%, size 62%, title 55%, factory marks 45% |
| 10909 | 51% | 2208.0 SEK | identity 54%, material 45%, size 62%, title 53%, factory marks 45% |
| 3155 | 50% | 1228.0 SEK | identity 54%, material 45%, size 62%, title 52%, factory marks 45% |
| 10604 | 50% | 801.0 SEK | identity 54%, material 45%, size 62%, title 51%, factory marks 45% |
| 5561 | 50% | 4300.0 SEK | identity 54%, material 45%, size 62%, title 50%, factory marks 45% |
| 5411 | 50% | 1700.0 SEK | identity 54%, material 45%, size 62%, title 49%, 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.