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KARL-ERIK BOMAN (1913-1981). Akvarell, blomstermotiv, signerad & daterad. K.E. Boman -1970.

Karl-Erik Boman · Prints and works on paper · Roslagens Auktionsverk

Open auction lot

54

research

Acquisition position

Current all in cost

425.0 SEK

Current bid or estimate200.0 SEK

Modelled discount71.5%

Liquidity score78%

Potential market value

Specialist value interval

500 to 4500 SEK

Value confidence69%

Comparable sales30

Evidence strength

38%

Identity confidence32%

Visual match0%

External references12

Market anomaly

79%

Information gap60%

Potential undervaluation71.5%

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 technique
missing edition
missing sheet_size

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistKarl-Erik Boman

MakerMissing

MediumMissing

MaterialsMissing

Dimensions? × ? × ? cm

WeightMissing g

YearMissing

EditionMissing

MarksMissing

ConditionNågot vågigt papper. Mindre fläckar på passepartout. Ram med ytslitage. Ej examinerad ur ram.

ProvenanceMissing

Modelworks_on_paper_specialist 2.0.0

Inglasad träram Ramens mått: ca 63 x 78 cm Bildmått: ca 44 x 37 cm Has resale rights.

Identity resolution

Artist and maker hypotheses

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

10 candidates

1 independent sources

Karl Koepping (German, 1848-1914) after Rembrandt van Rijn (Dutch, 1606-1669)

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

33% combined confidence

1 independent sources

Karl Schrag American, born Germany, 1912-1995

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

33% combined confidence

1 independent sources

Karl Wirsum American, 1939-2021

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

33% combined confidence

1 independent sources

Karl Hofer German, 1878-1955

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

33% combined confidence

1 independent sources

Karl Koehler (American, born 1913) Victor Ancona (American, 1912-1998)

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

33% combined confidence

1 independent sources

Ludwig Karl Hilberseimer American, born Germany, 1885–1967

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

33% combined confidence

1 independent sources

Karl Schmidt-Rottluff German, 1884–1976

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

33% combined confidence

1 independent sources

Designed by Erik Magnussen (American, born Denmark, 1884–1961) Gorham Manufacturing Company (American, founded 1831) Providence

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

25% combined confidence

1 independent sources

Designed by Erik Magnussen (American, born Denmark, 1884–1961) Gorham Manufacturing Company (American, founded 1831, part of Lenox since 2005) Providence

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

25% combined confidence

1 independent sources

Karl Schrag (American, 1912-1995, born Germany) printed by Joe Zirker (American, born 1924) published by Tamarind Lithography Workshop (American, founded 1960)

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

25% 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

Portrait of a Woman

Karl Koepping (German, 1848-1914) after Rembrandt van Rijn (Dutch, 1606-1669)

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

Covered Compote

Designed by Erik Magnussen (American, born Denmark, 1884–1961) Gorham Manufacturing Company (American, founded 1831, part of Lenox since 2005) Providence

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

Flicker and Gleam of Fire

Karl Schrag American, born Germany, 1912-1995

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

Screamin' Jay Hawkins

Karl Wirsum American, 1939-2021

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

Nightclouds and Reverie

Karl Schrag American, born Germany, 1912-1995

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

Overgrown Path

Karl Schrag (American, 1912-1995, born Germany) printed by Joe Zirker (American, born 1924) published by Tamarind Lithography Workshop (American, founded 1960)

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

Back Teria One Oh! One

Karl Wirsum American, 1939-2021

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

Carnival Figures

Karl Hofer German, 1878-1955

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

This Is the Enemy

Karl Koehler (American, born 1913) Victor Ancona (American, 1912-1998)

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

Highrise City (Hochhausstadt), Perspective View

Ludwig Karl Hilberseimer American, born Germany, 1885–1967

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

Two Girls in a Garden

Karl Schmidt-Rottluff German, 1884–1976

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

Shallow Bowl

Designed by Erik Magnussen (American, born Denmark, 1884–1961) Gorham Manufacturing Company (American, founded 1831) Providence

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

30 category specific sold comparables selected
model uses prints and works on paper 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
5952	54%	800.0 SEK	identity 59%, material 45%, size 62%, title 69%, edition 45%
4196	53%	11100.0 SEK	identity 59%, material 45%, size 62%, title 60%, edition 45%
2674	53%	1475.0 SEK	identity 64%, material 45%, size 62%, title 45%, edition 45%
6054	53%	13270.0 SEK	identity 56%, material 45%, size 62%, title 66%, edition 45%
4630	52%	4500.0 SEK	identity 59%, material 45%, size 62%, title 55%, edition 45%
5729	52%	1700.0 SEK	identity 57%, material 45%, size 62%, title 59%, edition 45%
6896	50%	300.0 SEK	identity 54%, material 45%, size 62%, title 56%, edition 45%
9388	50%	4920.0 SEK	identity 54%, material 45%, size 62%, title 51%, edition 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

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.