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YO JOHANSSON. OLJA PÅ DUK, båtmotiv, signerad.

Yo Johansson · Paintings · Borås Auktionshall

Open auction lot
54
research

Acquisition position

Current all in cost

680.0 SEK
Current bid or estimate500.0 SEK
Modelled discount61.0%
Liquidity score82%

Potential market value

Specialist value interval

300 to 7055 SEK
Value confidence72%
Comparable sales30

Evidence strength

37%
Identity confidence27%
Visual match0%
External references0

Market anomaly

68%
Information gap40%
Potential undervaluation61.0%

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
  • Alias or spelling mismatch

Decision guardrails

What must be verified

  • missing medium
  • missing dimensions

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistYo Johansson
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionGulnad färg. Fläckar. Skador på ramen samt duken.
ProvenanceMissing
Modelpainting_specialist 2.0.0

Dukmått 65x100 cm Rammått 80x114 cm Has resale rights.

Identity resolution

Artist and maker hypotheses

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

0 candidates
Research pending

No identity hypotheses yet

Run global research after adding the clearest available front, back, marks and label images.

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

0 references
Research pending

No external references stored

Run global research to search museum and authority collections.

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
98070%653.0 SEKidentity 86%, material 45%, size 62%, title 76%
217369%400.0 SEKidentity 86%, material 45%, size 62%, title 67%
174766%2500.0 SEKidentity 86%, material 45%, size 62%, title 45%
110766%7805.0 SEKidentity 86%, material 45%, size 62%, title 43%
111566%7055.0 SEKidentity 86%, material 45%, size 62%, title 43%
42460%6019.0 SEKidentity 67%, material 45%, size 62%, title 64%
102259%500.0 SEKidentity 67%, material 45%, size 62%, title 51%
156059%4000.0 SEKidentity 67%, material 45%, size 62%, title 51%

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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