Acquisition position
Current all in cost
1200.0 SEK
Current bid or estimate550.0 SEK
Modelled discount40.3%
Liquidity score84%
Mauno Mattila · Silver and metalware · Uppsala Auktionskammare
Acquisition position
Potential market value
Evidence strength
Market anomaly
Risk profile
Investigation rationale
Decision guardrails
Visual laboratory
Object record
Signerad Mauno Mattila och daterad 1970, metall på stensockel. L ca 44, H ca 32 cm. Has resale rights.
Identity resolution
Ranked from independent evidence. Confirmation or rejection becomes controlled training data.
Visual 0% · Name 86% · Marks 25% · Material 40%
34% combined confidenceVisual 0% · Name 45% · Marks 25% · Material 40%
29% combined confidenceVisual 0% · Name 42% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 40% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 41% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 40% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 39% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 37% · Marks 25% · Material 40%
28% combined confidenceVisual 0% · Name 37% · Marks 25% · Material 40%
27% combined confidenceVisual 0% · Name 35% · Marks 25% · Material 40%
27% combined confidenceVisual 0% · Name 39% · 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
Edward Steichen American, born Luxembourg, 1879–1973
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJohn Singer Sargent (American, 1856-1925) printed by Argus (South African, 19th-20th century)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGino Severini (Italian, 1883-1966) published by Guilde de la Gravure, Pully-Lausanne, Switzerland
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoRineke Dijkstra Dutch, born 1959
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGustave Baumann American, 1881-1971
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoOtto Dix (German, 1891-1969) published by Verlag Karl Nierendorf/Galerie Nierendorf (German, founded 1920)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoLee Friedlander American, born 1934
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoJonathan De Pas (Italian,1932–1991) Donato D’Urbino (Italian, born 1935) Paolo Lomazzi (Italian, born 1936) Carla Scolari (Italian, born 1930's) Manufactured by Zanotta (Italian, founded 1954)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoHarold Allen American, 1912–1998
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoBernd Becher (German, 1931–2007) and Hilla Becher (German, 1934-2015)
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoTokihiro Sato Japanese, born 1957
0% similarityCheck object rights; API metadata is openArt Institute of ChicagoGustave Baumann American, 1881-1971
0% similarityCheck object rights; API metadata is openComparable logic
| Comparable ID | Match | Price | Reasons |
|---|---|---|---|
| 11571 | 51% | 8500.0 SEK | identity 54%, material 45%, size 62%, title 41%, hallmarks 45%, weight 62% |
| 12562 | 50% | 10000.0 SEK | identity 52%, material 45%, size 62%, title 34%, hallmarks 45%, weight 62% |
| 11595 | 50% | 2600.0 SEK | identity 52%, material 45%, size 62%, title 35%, hallmarks 45%, weight 62% |
| 17506 | 50% | 8000.0 SEK | identity 52%, material 45%, size 62%, title 32%, hallmarks 45%, weight 62% |
| 20022 | 49% | 1101.0 SEK | identity 45%, material 45%, size 62%, title 57%, hallmarks 45%, weight 62% |
| 2593 | 49% | 300.0 SEK | identity 46%, material 45%, size 62%, title 51%, hallmarks 45%, weight 62% |
| 12552 | 49% | 200.0 SEK | identity 48%, material 45%, size 62%, title 40%, hallmarks 45%, weight 62% |
| 14841 | 49% | 949.0 SEK | identity 48%, material 45%, size 62%, title 37%, 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.