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CARL-HARRY STÅLHANE. VAS, porslin, Rörstrand.

Carl-Harry Stålhane · Ceramics and porcelain · Södermanlands Auktionsverk

Open auction lot

54

research

Acquisition position

Current all in cost

375.0 SEK

Current bid or estimate300.0 SEK

Modelled discount67.1%

Liquidity score80%

Potential market value

Specialist value interval

350 to 1750 SEK

Value confidence72%

Comparable sales30

Evidence strength

39%

Identity confidence32%

Visual match0%

External references12

Market anomaly

74%

Information gap67%

Potential undervaluation67.1%

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
Large gap to recent market history
Estimate materially below specialist value

Decision guardrails

What must be verified

missing factory
missing material
missing mark
missing dimensions

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistCarl-Harry Stålhane

MakerMissing

MediumMissing

MaterialsMissing

Dimensions? × ? × ? cm

WeightMissing g

YearMissing

EditionMissing

MarksMissing

ConditionAnvänt slitage.

ProvenanceMissing

Modelceramics_specialist 2.0.0

Höjd ca 18 cm.

Identity resolution

Artist and maker hypotheses

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

8 candidates

1 independent sources

Harry Callahan American, 1912–1999

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

33% combined confidence

1 independent sources

Carl Blechen (German, 1798–1840)

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

33% combined confidence

1 independent sources

Carl Andre American, 1935-2024

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

33% combined confidence

1 independent sources

Harry Weese American, 1915–1998

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

33% combined confidence

1 independent sources

Frederick Carl Frieseke American, 1874-1939

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

33% combined confidence

1 independent sources

Arthur B. Carles American, 1882–1952

Visual 0% · Name 45% · Marks 25% · Material 40%

26% combined confidence

1 independent sources

Carle Vernet (French, 1758-1836) printed by Comte Charles Philibert De Lasteyrie (French, 1759-1849)

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

25% combined confidence

1 independent sources

Max Slevogt (German, 1868-1932) James Fenimore Cooper (American, 1789-1851)

Visual 0% · Name 37% · 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

Chicago

Harry Callahan American, 1912–1999

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

The Interior of the Palm House on the Pfaueninsel Near Potsdam

Carl Blechen (German, 1798–1840)

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

Steel-Aluminum Plain

Carl Andre American, 1935-2024

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

Detroit

Harry Callahan American, 1912–1999

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

Indians Attacking at Harry Harry

Max Slevogt (German, 1868-1932) James Fenimore Cooper (American, 1789-1851)

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

Calla Lilies

Arthur B. Carles American, 1882–1952

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

Barbara with Mask, Chicago

Harry Callahan American, 1912–1999

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

Cuirassier on Foot Restraining His Rearing Horse

Carle Vernet (French, 1758-1836) printed by Comte Charles Philibert De Lasteyrie (French, 1759-1849)

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

1992 World's Fair, Chicago, Illinois: Pespective Rendering of Ferris Wheel, Looking West through Navy Pier Atrium

Harry Weese American, 1915–1998

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

Frances at the Piano

Frederick Carl Frieseke American, 1874-1939

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

Collage

Harry Callahan American, 1912–1999

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

Alley, Chicago

Harry Callahan American, 1912–1999

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

30 category specific sold comparables selected
model uses ceramics and porcelain 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
3306	67%	1800.0 SEK	identity 100%, material 45%, size 62%, title 89%, factory marks 45%
4368	67%	1900.0 SEK	identity 100%, material 45%, size 62%, title 89%, factory marks 45%
8913	67%	1000.0 SEK	identity 100%, material 45%, size 62%, title 89%, factory marks 45%
10277	67%	1200.0 SEK	identity 100%, material 45%, size 62%, title 83%, factory marks 45%
10280	67%	800.0 SEK	identity 100%, material 45%, size 62%, title 83%, factory marks 45%
342	67%	1206.0 SEK	identity 100%, material 45%, size 62%, title 83%, factory marks 45%
1432	67%	401.0 SEK	identity 100%, material 45%, size 62%, title 83%, factory marks 45%
2288	67%	1747.0 SEK	identity 100%, material 45%, size 62%, title 83%, factory 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

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.