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ULLA OCH GUSTAV KRAITZ. Skulptur, "Äpple", glaserat stengods, signerad.

Ulla Och Gustav Kraitz · Sculpture · Stockholms Auktionsverk Helsingborg

Open auction lot
22
low priority

Acquisition position

Current all in cost

3000.0 SEK
Current bid or estimate3000.0 SEK
Modelled discount0.0%
Liquidity score68%

Potential market value

Specialist value interval

300 to 3030 SEK
Value confidence68%
Comparable sales30

Evidence strength

36%
Identity confidence27%
Visual match0%
External references12

Market anomaly

0%
Information gap67%
Potential undervaluation0.0%

Risk profile

8%
Authenticity risk8%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied
  • Large gap to recent market history
  • Alias or spelling mismatch

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

ArtistUlla Och Gustav Kraitz
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionSmärre slitage.
ProvenanceMissing
Modelsculpture_specialist 2.0.0

På sockel av trä. H ca 12 cm.

Identity resolution

Artist and maker hypotheses

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

11 candidates
1 independent sources

Harold Eugene Edgerton American, 1903–1990

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

24% combined confidence
1 independent sources

Leonard Baskin American, 1922-2000

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

20% combined confidence
1 independent sources

Gustave Baumann American, 1881-1971

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

20% combined confidence
1 independent sources

Evert Pieters Dutch, 1856-1932

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

20% combined confidence
1 independent sources

Diego Rivera Mexican, 1886-1957

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

20% combined confidence
1 independent sources

Martin Schongauer German, c. 1430/50-1491

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

19% combined confidence
1 independent sources

Karl Wirsum American, 1939-2021

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

19% combined confidence
1 independent sources

Stanislas Lépine (French, 1835–1892)

Visual 0% · Name 35% · Marks 25% · Material 0%

19% combined confidence
1 independent sources

Edward Steichen American, born Luxembourg, 1879–1973

Visual 0% · Name 35% · Marks 25% · Material 0%

19% combined confidence
1 independent sources

Charles François Daubigny French, 1817-1878

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

19% combined confidence
1 independent sources

Willem Witsen Dutch, 1860-1923

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

19% 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

Apple Blossoms

Gustave Baumann American, 1881-1971

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

Thorn Apple

Leonard Baskin American, 1922-2000

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

Still Life with an Apple

Diego Rivera Mexican, 1886-1957

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

Apple Blossoms

Gustave Baumann American, 1881-1971

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

Shooting the Apple

Harold Eugene Edgerton American, 1903–1990

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

Interior, Dutch Girl Peeling an Apple

Evert Pieters Dutch, 1856-1932

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

The Madonna and Child with an Apple

Martin Schongauer German, c. 1430/50-1491

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

The Apple Market

Stanislas Lépine (French, 1835–1892)

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

Apple Blossoms

Edward Steichen American, born Luxembourg, 1879–1973

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

Apple-Polished Zombunny

Karl Wirsum American, 1939-2021

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

Apple Trees at Auvers

Charles François Daubigny French, 1817-1878

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

The Apple Tree

Willem Witsen Dutch, 1860-1923

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
1073269%48000.0 SEKidentity 100%, material 45%, size 62%, title 73%, foundry or marks 45%
32956%3508.0 SEKidentity 67%, material 45%, size 62%, title 52%, foundry or marks 45%
65951%300.0 SEKidentity 53%, material 45%, size 62%, title 55%, foundry or marks 45%
592250%1100.0 SEKidentity 45%, material 45%, size 62%, title 78%, foundry or marks 45%
1644649%1400.0 SEKidentity 49%, material 45%, size 62%, title 48%, foundry or marks 45%
1367749%1000.0 SEKidentity 49%, material 45%, size 62%, title 48%, foundry or marks 45%
416449%300.0 SEKidentity 45%, material 45%, size 62%, title 64%, foundry or marks 45%
702549%750.0 SEKidentity 45%, material 45%, size 62%, title 64%, 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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