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BERTIL VALLIEN. skulptur, Brains, Kosta Boda, signerad.

Bertil Vallien · Sculpture · Gomér & Andersson Linköping

Open auction lot
24
low priority

Acquisition position

Current all in cost

1500.0 SEK
Current bid or estimate1500.0 SEK
Modelled discount10.4%
Liquidity score68%

Potential market value

Specialist value interval

670 to 3755 SEK
Value confidence71%
Comparable sales30

Evidence strength

41%
Identity confidence37%
Visual match0%
External references13

Market anomaly

8%
Information gap67%
Potential undervaluation10.4%

Risk profile

8%
Authenticity risk8%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied

Decision guardrails

What must be verified

  • missing material
  • missing dimensions
  • missing foundry
  • missing edition

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistBertil Vallien
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionSmärre ytslitage.
ProvenanceMissing
Modelsculpture_specialist 2.0.0

Höjd ca 8 cm I låda.

Identity resolution

Artist and maker hypotheses

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

12 candidates
1 independent sources

Bertil Vallien

Visual 0% · Name 100% · Marks 25% · Material 40%

35% combined confidence
1 independent sources

Designed by Bertil Vallien Swedish, born 1938 Made by Kosta Boda Kosta, Småland, Sweden, founded 1742

Visual 0% · Name 57% · Marks 25% · Material 40%

28% combined confidence
1 independent sources

Designed by Vicke Lindstrand Swedish, 1904-1983 Kosta Glasbruk (now Kosta Boda) Kosta, Småland, Sweden, founded 1742

Visual 0% · Name 44% · Marks 25% · Material 40%

26% combined confidence
1 independent sources

Humberto Aquino American, born Peru, 1947

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

25% combined confidence
1 independent sources

Jessa Rae Growing Thunder, PhD (Dakhóta/Nakoda, born 1989) Sandia Park, New Mexico

Visual 0% · Name 41% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Marcus Amerman (Choctaw, born 1959) Kooskia, Idaho

Visual 0% · Name 41% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

Beverly Bear King Moran (Hunkpapa Lakota, enrolled Standing Rock Sioux Tribe, and American, born 1958) Los Lunas, New Mexico

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

25% combined confidence
1 independent sources

Jesse Howard (American, 1885–1983)

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

25% combined confidence
1 independent sources

Christopher Wool American, born 1955

Visual 0% · Name 37% · Marks 25% · Material 40%

25% combined confidence
1 independent sources

George Wesley Bellows American, 1882-1925

Visual 0% · Name 36% · Marks 25% · Material 40%

24% combined confidence
1 independent sources

Frank Reichmann (American, 1913-1960) published by the Works Progress Administration

Visual 0% · Name 34% · Marks 25% · Material 40%

24% combined confidence
1 independent sources

Paul Gavarni French, 1804-1866

Visual 0% · Name 33% · 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

13 references
The Met Open Access

MAP III

Bertil Vallien

0% similaritymetadata only or restricted imageArt Institute of Chicago

Vase

Designed by Bertil Vallien Swedish, born 1938 Made by Kosta Boda Kosta, Småland, Sweden, founded 1742

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

Maggie's Brain

Christopher Wool American, born 1955

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

Head of a Girl

Designed by Vicke Lindstrand Swedish, 1904-1983 Kosta Glasbruk (now Kosta Boda) Kosta, Småland, Sweden, founded 1742

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

Mr. Brain

Humberto Aquino American, born Peru, 1947

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

Heavy Lies the Head that Wears a Brain

George Wesley Bellows American, 1882-1925

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

Brain Surgery

Frank Reichmann (American, 1913-1960) published by the Works Progress Administration

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

Untitled (Brain Washed Yesser...)

Jesse Howard (American, 1885–1983)

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

Les Propos de Thomas Vireloque: Brains cracked-but bottles

Paul Gavarni French, 1804-1866

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

Little Chief

Marcus Amerman (Choctaw, born 1959) Kooskia, Idaho

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

Chief Joseph

Marcus Amerman (Choctaw, born 1959) Kooskia, Idaho

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

Šungwáĉikhiyapi (Horse Dance)

Beverly Bear King Moran (Hunkpapa Lakota, enrolled Standing Rock Sioux Tribe, and American, born 1958) Los Lunas, New Mexico

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

Pendant and Necklace

Jessa Rae Growing Thunder, PhD (Dakhóta/Nakoda, born 1989) Sandia Park, New Mexico

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
1197772%1300.0 SEKidentity 100%, material 45%, size 62%, title 100%, foundry or marks 45%
1145872%1900.0 SEKidentity 100%, material 45%, size 62%, title 100%, foundry or marks 45%
517471%5500.0 SEKidentity 100%, material 45%, size 62%, title 92%, foundry or marks 45%
1055871%2000.0 SEKidentity 100%, material 45%, size 62%, title 90%, foundry or marks 45%
1033471%3100.0 SEKidentity 100%, material 45%, size 62%, title 90%, foundry or marks 45%
262371%670.0 SEKidentity 100%, material 45%, size 62%, title 90%, foundry or marks 45%
105669%9755.0 SEKidentity 100%, material 45%, size 62%, title 69%, foundry or marks 45%
1159857%900.0 SEKidentity 67%, material 45%, size 62%, title 70%, foundry or marks 45%

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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