NILS ZETTERBERG. Komposition med figur, färglitografi, signerad.

Nils Zetterberg · Paintings · Falun Auktionsbyrå

Open auction lot

research

Acquisition position

Current all in cost

425.0 SEK

Current bid or estimate300.0 SEK

Modelled discount73.4%

Liquidity score82%

Potential market value

Specialist value interval

300 to 3450 SEK

Value confidence72%

Comparable sales30

Evidence strength

40%

Identity confidence32%

Visual match0%

External references12

Market anomaly

83%

Information gap40%

Potential undervaluation73.4%

Risk profile

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

ArtistNils Zetterberg

MakerMissing

MediumMissing

MaterialsMissing

Dimensions? × ? × ? cm

WeightMissing g

YearMissing

EditionMissing

MarksMissing

ConditionNo remarks.

ProvenanceMissing

Modelpainting_specialist 2.0.0

Rammått 46 x 53,5cm. Has resale rights.

Identity resolution

Artist and maker hypotheses

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

11 candidates

1 independent sources

Nils-Ole Lund Danish, born 1930

Visual 0% · Name 86% · Marks 25% · Material 40%

33% combined confidence

1 independent sources

Attributed to the Ixion Painter Greek; Campania, Italy

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

25% combined confidence

1 independent sources

Attributed to the Penthesilea Painter Greek; Athens

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

25% combined confidence

1 independent sources

Attributed to the Euaion Painter Greek; Athens

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

25% combined confidence

1 independent sources

Attributed to the Mattinata Painter Greek; Apulia, Italy

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

25% combined confidence

1 independent sources

Attributed to a painter of the Leagros group Greek; Athens

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

25% combined confidence

1 independent sources

Attributed to a Member of the Earlier Mannerist Group Greek; Athens

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

25% combined confidence

1 independent sources

Attributed to the Chicago Painter Greek; Athens

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

25% combined confidence

1 independent sources

Constantin Brancusi Romanian, active France, 1876–1957

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

25% combined confidence

1 independent sources

Alberto Giacometti Swiss, 1901–1966

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

24% combined confidence

1 independent sources

Greek; Athens

Visual 0% · Name 28% · Marks 25% · Material 40%

23% 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

Trouble in Heaven, Presentation Collage

Nils-Ole Lund Danish, born 1930

"Acropolis" Chicago, Collage

Nils-Ole Lund Danish, born 1930

Column-Krater (Mixing Bowl)

Attributed to a Member of the Earlier Mannerist Group Greek; Athens

Hydria (Water Jar)

Attributed to a painter of the Leagros group Greek; Athens

Pyxis (Container for Personal Objects)

Attributed to the Euaion Painter Greek; Athens

Stamnos (Mixing Jar)

Attributed to the Chicago Painter Greek; Athens

Pyxis (Container for Personal Objects)

Greek; Athens

Oinochoe (Pitcher)

Attributed to the Mattinata Painter Greek; Apulia, Italy

Kylix (Drinking Cup)

Attributed to the Penthesilea Painter Greek; Athens

Amphora (Storage Jar)

Attributed to the Ixion Painter Greek; Campania, Italy

White Negress II

Constantin Brancusi Romanian, active France, 1876–1957

Tall Figure

Alberto Giacometti Swiss, 1901–1966

Comparable logic

Specialist model explanation

30 category specific sold comparables selected
model uses paintings specific identity, material, size and documentary fields
value interval uses weighted 20th, 50th and 80th percentiles with a dispersion adjustment
explicit category supplied

Comparable ID	Match	Price	Reasons
13943	59%	300.0 SEK	identity 62%, material 45%, size 62%, title 64%
12576	57%	1128.0 SEK	identity 62%, material 45%, size 62%, title 56%
13353	57%	5050.0 SEK	identity 62%, material 45%, size 62%, title 51%
13461	57%	1500.0 SEK	identity 62%, material 45%, size 62%, title 51%
14279	57%	4435.0 SEK	identity 62%, material 45%, size 62%, title 50%
13030	57%	2210.0 SEK	identity 62%, material 45%, size 62%, title 50%
12692	56%	4257.0 SEK	identity 62%, material 45%, size 62%, title 47%
11749	56%	3500.0 SEK	identity 59%, 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

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.

Current all in cost

Specialist value interval

Why this may be worth considering

What must be verified

Add and compare research imagery

Known facts and missing information

Artist and maker hypotheses

Nils-Ole Lund Danish, born 1930

Attributed to the Ixion Painter Greek; Campania, Italy

Attributed to the Penthesilea Painter Greek; Athens

Attributed to the Euaion Painter Greek; Athens

Attributed to the Mattinata Painter Greek; Apulia, Italy

Attributed to a painter of the Leagros group Greek; Athens

Attributed to a Member of the Earlier Mannerist Group Greek; Athens

Attributed to the Chicago Painter Greek; Athens

Constantin Brancusi Romanian, active France, 1876–1957

Alberto Giacometti Swiss, 1901–1966

Greek; Athens

Teach the valuation model

Truth before training

Reference material found elsewhere

Trouble in Heaven, Presentation Collage

"Acropolis" Chicago, Collage

Column-Krater (Mixing Bowl)

Hydria (Water Jar)

Pyxis (Container for Personal Objects)

Stamnos (Mixing Jar)

Pyxis (Container for Personal Objects)

Oinochoe (Pitcher)

Kylix (Drinking Cup)

Amphora (Storage Jar)

White Negress II

Tall Figure

Specialist model explanation

Every artwork image is checked for signatures and marks

No automatic mark result yet

Isolate and identify signatures, hallmarks and maker marks

Match an unknown mark

Add a known reference

Check consistency with known genuine variation

No forensic check yet