JOSEF FRANK. 6 st, bordsunderlägg, Firma Svensk Tenn.

Josef Frank · Silver and metalware · Auktionshuset Kolonn

Open auction lot

research

Acquisition position

Current all in cost

658.82 SEK

Current bid or estimate450.0 SEK

Modelled discount85.4%

Liquidity score84%

Potential market value

Specialist value interval

2204 to 8006 SEK

Value confidence75%

Comparable sales30

Evidence strength

42%

Identity confidence36%

Visual match0%

External references12

Market anomaly

86%

Information gap67%

Potential undervaluation85.4%

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
all in acquisition cost is at least 75 percent below modelled value
Estimate materially below specialist value
Large gap to recent market history

Decision guardrails

What must be verified

missing hallmarks
missing fineness
missing weight
missing date_letter

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistJosef Frank

MakerMissing

MediumMissing

MaterialsMissing

Dimensions? × ? × ? cm

WeightMissing g

YearMissing

EditionMissing

MarksMissing

ConditionBruksslitage, mindre skador och fläckar.

ProvenanceMissing

Modelsilver_metalware_specialist 2.0.0

Motiv av världsdelar, sydamerika, nordamerika, afrika, samt asien. Ca 30 x 40 cm.

Identity resolution

Artist and maker hypotheses

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

12 candidates

1 independent sources

Frank Lloyd Wright American, 1867–1959

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

33% combined confidence

1 independent sources

Frank Lloyd Wright (American, 1867–1959) Oak Park, Illinois

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

33% combined confidence

1 independent sources

Sally Mann American, born 1951

Visual 0% · Name 43% · Marks 25% · Material 40%

26% combined confidence

1 independent sources

Francis Alÿs Belgian, born 1959

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

26% combined confidence

1 independent sources

Manufactured by Sèvres Porcelain Manufactory (French, founded 1740) Designed by Léonard-Agathon van Weydeveld (French, born Belgian 1841-1923) France, Sèvres

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

25% combined confidence

1 independent sources

Timothy O'Sullivan (American, born Ireland, 1840–1882) and Mark Klett (American, born 1952)

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

25% combined confidence

1 independent sources

Dieter Appelt German, born 1935

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

25% combined confidence

1 independent sources

Toshiko Takaezu (American, 1922–2011)

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

25% combined confidence

1 independent sources

Harvey Lewis American, c. 1783–1835 Philadelphia

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

25% combined confidence

1 independent sources

Francis W. Cooper American, active 1840–1851 New York

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

25% combined confidence

1 independent sources

Édouard Baldus (French, born Germany, 1813–1889) printed by Chicago Albumen Works

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

25% combined confidence

1 independent sources

Worcester Porcelain Factory (Warmstry House Period, 1751–1783) Worcester, England, founded 1751

Visual 0% · Name 35% · 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

12 references

Art Institute of Chicago

Centerpiece: The Scarf Dance (Surtout: Le jeu de l'écharpe)

Manufactured by Sèvres Porcelain Manufactory (French, founded 1740) Designed by Léonard-Agathon van Weydeveld (French, born Belgian 1841-1923) France, Sèvres

The Presence of Things in Time (Die Präsenz der Dinge in der Zeit)

Dieter Appelt German, born 1935

Tea and Coffee Service

Francis W. Cooper American, active 1840–1851 New York

Tea and Coffee Service

Harvey Lewis American, c. 1783–1835 Philadelphia

Six Bowls

Toshiko Takaezu (American, 1922–2011)

Tea Set

Worcester Porcelain Factory (Warmstry House Period, 1751–1783) Worcester, England, founded 1751

Quartz Mill near Virginia City

Timothy O'Sullivan (American, born Ireland, 1840–1882) and Mark Klett (American, born 1952)

Henry Wallis, Summer Cottage, Lake Delavan, Wisconsin

Frank Lloyd Wright American, 1867–1959

Untitled

Édouard Baldus (French, born Germany, 1813–1889) printed by Chicago Albumen Works

Spindle Cube Chair

Frank Lloyd Wright (American, 1867–1959) Oak Park, Illinois

Rodney Plogger at 6:01, from the series "Immediate Family"

Sally Mann American, born 1951

The Prophet (Part 6/6)

Francis Alÿs Belgian, born 1959

Comparable logic

Specialist model explanation

30 category specific sold comparables selected
model uses silver and metalware 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
3683	67%	500.0 SEK	identity 100%, material 45%, size 62%, title 83%, hallmarks 45%, weight 62%
18342	66%	1100.0 SEK	identity 100%, material 45%, size 62%, title 74%, hallmarks 45%, weight 62%
17669	66%	2400.0 SEK	identity 100%, material 45%, size 62%, title 74%, hallmarks 45%, weight 62%
15243	66%	4500.0 SEK	identity 100%, material 45%, size 62%, title 73%, hallmarks 45%, weight 62%
1320	66%	9500.0 SEK	identity 100%, material 45%, size 62%, title 74%, hallmarks 45%, weight 62%
17983	66%	1205.0 SEK	identity 100%, material 45%, size 62%, title 71%, hallmarks 45%, weight 62%
11497	66%	3100.0 SEK	identity 100%, material 45%, size 62%, title 72%, hallmarks 45%, weight 62%
16886	66%	2000.0 SEK	identity 100%, material 45%, size 62%, title 69%, hallmarks 45%, weight 62%

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

Frank Lloyd Wright American, 1867–1959

Frank Lloyd Wright (American, 1867–1959) Oak Park, Illinois

Sally Mann American, born 1951

Francis Alÿs Belgian, born 1959

Manufactured by Sèvres Porcelain Manufactory (French, founded 1740) Designed by Léonard-Agathon van Weydeveld (French, born Belgian 1841-1923) France, Sèvres

Timothy O'Sullivan (American, born Ireland, 1840–1882) and Mark Klett (American, born 1952)

Dieter Appelt German, born 1935

Toshiko Takaezu (American, 1922–2011)

Harvey Lewis American, c. 1783–1835 Philadelphia

Francis W. Cooper American, active 1840–1851 New York

Édouard Baldus (French, born Germany, 1813–1889) printed by Chicago Albumen Works

Worcester Porcelain Factory (Warmstry House Period, 1751–1783) Worcester, England, founded 1751

Teach the valuation model

Truth before training

Reference material found elsewhere

Centerpiece: The Scarf Dance (Surtout: Le jeu de l'écharpe)

The Presence of Things in Time (Die Präsenz der Dinge in der Zeit)

Tea and Coffee Service

Tea and Coffee Service

Six Bowls

Tea Set

Quartz Mill near Virginia City

Henry Wallis, Summer Cottage, Lake Delavan, Wisconsin

Untitled

Spindle Cube Chair

Rodney Plogger at 6:01, from the series "Immediate Family"

The Prophet (Part 6/6)

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