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THEODOR JÖNSSON. UTEMILJÖ, OLJA PÅ PANNÅ, SIGNERAD.

Theodor Jönsson · Paintings · Crafoord Auktioner Lund

Open auction lot
54
research

Acquisition position

Current all in cost

607.33 SEK
Current bid or estimate400.0 SEK
Modelled discount66.1%
Liquidity score82%

Potential market value

Specialist value interval

400 to 2600 SEK
Value confidence71%
Comparable sales30

Evidence strength

38%
Identity confidence30%
Visual match0%
External references12

Market anomaly

72%
Information gap40%
Potential undervaluation66.1%

Risk profile

8%
Authenticity risk8%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied
  • auction estimate is materially below the specialist model
  • all in acquisition cost is at least 55 percent below modelled value
  • Estimate materially below specialist value

Decision guardrails

What must be verified

  • missing medium
  • missing dimensions

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistTheodor Jönsson
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionMycket krackelyr i verkets övre hälft.
ProvenanceMissing
Modelpainting_specialist 2.0.0

Dagermått: 26,5 x 22,5 cm Rammått: 35 x 29,5 cm.

Identity resolution

Artist and maker hypotheses

Ranked from independent evidence. Confirmation or rejection becomes controlled training data.

9 candidates
1 independent sources

Theodore Robinson (American, 1852–1896)

Visual 0% · Name 51% · Marks 25% · Material 40%

27% combined confidence
1 independent sources

Théodore Rousseau (French, 1812–1867)

Visual 0% · Name 47% · Marks 25% · Material 40%

26% combined confidence
1 independent sources

Theodore Stamos American, 1922–1997

Visual 0% · Name 43% · Marks 25% · Material 40%

26% combined confidence
1 independent sources

Théodore Chassériau French, 1819-1856

Visual 0% · Name 42% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Paul Theodore Frankl (American, born Austria, 1886–1958) New York

Visual 0% · Name 39% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Théodore Rousseau (French, 1812-1867) printed by Auguste Delâtre (French, 1822-1907)

Visual 0% · Name 39% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Charles Emile Callande de Champmartin (French, 1797–1883)

Visual 0% · Name 38% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Jean Louis André Théodore Géricault (French, 1791–1824)

Visual 0% · Name 38% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Anders Zorn Swedish, 1860-1920

Visual 0% · Name 32% · Marks 25% · Material 40%

24% combined confidence

Closed deal feedback

Teach the valuation model

Enter the verified hammer price after the auction closes. Only verified outcomes become calibration data.

Learning guardrail

Truth before training

  • Unverified AI output is stored as a hypothesis only.
  • One-source matches are confidence capped.
  • Rejected matches improve source and feature calibration.
  • At least five verified closed sales are required per category.

Global research evidence

Reference material found elsewhere

12 references
Art Institute of Chicago

Landscape

Théodore Rousseau (French, 1812–1867)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Springtime

Théodore Rousseau (French, 1812–1867)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

The Valley of Arconville

Theodore Robinson (American, 1852–1896)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Rock Oaks

Théodore Rousseau (French, 1812-1867) printed by Auguste Delâtre (French, 1822-1907)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Skyscraper Cabinet

Paul Theodore Frankl (American, born Austria, 1886–1958) New York

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Théodore Géricault on His Deathbed

Charles Emile Callande de Champmartin (French, 1797–1883)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

View of Saleve, near Geneva

Théodore Rousseau (French, 1812–1867)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Classic Boundaries I

Theodore Stamos American, 1922–1997

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Landscape

Théodore Rousseau (French, 1812–1867)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Owake! what ho! Brabantio! thieves! thieves!, plate one from Othello

Théodore Chassériau French, 1819-1856

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Head of a Guillotined Man

Jean Louis André Théodore Géricault (French, 1791–1824)

0% similarityCheck object rights; API metadata is open
Art Institute of Chicago

Theodore Roosevelt

Anders Zorn Swedish, 1860-1920

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
1987260%200.0 SEKidentity 67%, material 45%, size 62%, title 59%
1951459%1600.0 SEKidentity 67%, material 45%, size 62%, title 56%
1821559%1211.0 SEKidentity 65%, material 45%, size 62%, title 56%
2046056%1600.0 SEKidentity 67%, material 45%, size 62%, title 32%
2089756%1550.0 SEKidentity 67%, material 45%, size 62%, title 32%
2056256%800.0 SEKidentity 67%, material 45%, size 62%, title 32%
1978756%1330.0 SEKidentity 55%, material 45%, size 62%, title 64%
2108955%1100.0 SEKidentity 56%, material 45%, size 62%, title 56%

Automatic signature module

Every artwork image is checked for signatures and marks

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.

Candidate regions0
Signature regions0
AI enrichmentLocal only
PipelineNot run

No automatic mark result yet

The module runs during normal analysis when a local image is available.

Marks laboratory

Isolate and identify signatures, hallmarks and maker marks

110 independent methods generate cleanup variants, stroke and symbol descriptors, library matches, trust controls and conflict warnings.

Open mark library

Match an unknown mark

Upload the tightest available crop. Include a little surrounding surface so the system can separate paint, engraving, glare and background.

Add a known reference

Signature forensics

Check consistency with known genuine variation

This does not declare a signature genuine. It measures fit against a multi-source reference set, confusing signers and natural variation.

No forensic check yet

Run mark matching first, then compare the questioned signature against a sufficiently broad trusted reference set.

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