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JOHAN PETTERSSON BERG. BÄGARE. Silver. Norrköping, 1747.

Johan Pettersson Berg · Silver and metalware · Skånes Auktionsverk

Open auction lot
29
low priority

Acquisition position

Current all in cost

1500.0 SEK
Current bid or estimate1000.0 SEK
Modelled discount20.2%
Liquidity score84%

Potential market value

Specialist value interval

650 to 4200 SEK
Value confidence70%
Comparable sales30

Evidence strength

39%
Identity confidence32%
Visual match0%
External references12

Market anomaly

16%
Information gap67%
Potential undervaluation20.2%

Risk profile

13%
Authenticity risk13%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied
  • Alias or spelling mismatch

Decision guardrails

What must be verified

  • category trap check: silver plate
  • missing hallmarks
  • missing fineness
  • missing weight
  • missing date_letter

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistJohan Pettersson Berg
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionBruks- och åldersrelaterat slitage.
ProvenanceMissing
Modelsilver_metalware_specialist 2.0.0

Höjd 9, diameter 8,5 cm.

Identity resolution

Artist and maker hypotheses

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

8 candidates
1 independent sources

Willem van Mieris (Dutch, 1662–1747)

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

33% combined confidence
1 independent sources

Giuseppe Maria Crespi (Italian, 1665–1747)

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

33% combined confidence
1 independent sources

Francesco Solimena (Italian, 1657–1747)

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

33% combined confidence
1 independent sources

Torii Kiyonobu II Japanese, active c. 1725-61

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

25% combined confidence
1 independent sources

Torii Kiyomasu II Japanese, 1706 (?)–1763 (?)

Visual 0% · Name 35% · Marks 25% · Material 40%

24% combined confidence
1 independent sources

Okumura Masanobu Japanese, 1686-1764

Visual 0% · Name 33% · Marks 25% · Material 40%

24% combined confidence
1 independent sources

François Boucher (French, 1703–1770)

Visual 0% · Name 33% · Marks 25% · Material 40%

24% combined confidence
1 independent sources

Joseph Highmore (English, 1692-1780)

Visual 0% · Name 33% · 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

Are They Thinking about the Grape? (Pensent-ils au raisin?)

François Boucher (French, 1703–1770)

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

A Mother Feeding her Child (The Happy Mother)

Willem van Mieris (Dutch, 1662–1747)

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

The Wedding at Cana

Giuseppe Maria Crespi (Italian, 1665–1747)

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

Adam and Eve in Paradise

Francesco Solimena (Italian, 1657–1747)

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

Mrs. Freeman Flower

Joseph Highmore (English, 1692–1780)

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

The Actors Ichimura Uzaemon VIII as Oguri Hangan and Segawa Kikunojo I as Terute no Mae in the play "Mangetsu Oguri Yakata," performed at the Ichimura Theater in the eighth month, 1747

Torii Kiyonobu II Japanese, active c. 1725-61

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

The Actors Sanogawa Ichimatsu I as Ike no Shoji and Segawa Kikujiro I as Hitachi Kohagi in the play "Mangetsu Oguri Yakata," performed at the Ichimura Theater in the eighth month, 1747

Torii Kiyonobu II Japanese, active c. 1725-61

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

Freeman Flower

Joseph Highmore (English, 1692-1780)

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

The Actors Sanogawa Ichimatsu I as Minamoto no Yorimasa and Segawa Kikujiro I as Nobutsura's wife Karumo in the play "Shusse Momijigari," performed at the Ichimura Theater in the eleventh month, 1747

Torii Kiyonobu II Japanese, active c. 1725-61

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

The Actor Sanogawa Ichimatsu I as Ike no Shoji in the play "Mangetsu Oguri Yakata," performed at the Ichimura Theater in the eighth Month, 1747

Torii Kiyonobu II Japanese, active c. 1725-61

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

The Actors Segawa Kikunojo I as Onatsu and Ichimura Uzaemon VIII as Seijuro in the play "Uno Hana Nisei no Aikago," performed at the Ichimura Theater in the fourth month, 1747

Okumura Masanobu Japanese, 1686-1764

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

The Actor Ichimura Uzaemon VIII as Oguri Hangan in the play "Mangetsu Oguri Yakata," performed at the Ichimura Theater in the eighth month, 1747

Torii Kiyomasu II Japanese, 1706 (?)–1763 (?)

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
80558%4200.0 SEKidentity 74%, material 45%, size 62%, title 55%, hallmarks 45%, weight 62%
308156%650.0 SEKidentity 69%, material 45%, size 62%, title 48%, hallmarks 45%, weight 62%
772154%1325.0 SEKidentity 62%, material 45%, size 62%, title 54%, hallmarks 45%, weight 62%
1654%800.0 SEKidentity 62%, material 45%, size 62%, title 42%, hallmarks 45%, weight 62%
95152%4200.0 SEKidentity 56%, material 45%, size 62%, title 54%, hallmarks 45%, weight 62%
968552%2000.0 SEKidentity 56%, material 45%, size 62%, title 44%, hallmarks 45%, weight 62%
780452%600.0 SEKidentity 56%, material 45%, size 62%, title 45%, hallmarks 45%, weight 62%
1012651%1900.0 SEKidentity 45%, material 45%, size 62%, title 93%, 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

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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