← Back to command center

THORVALD MARTHINSEN. Ljusstakar, ett par, silver, Norge.

Thorvald Marthinsen · Silver and metalware · Ekenbergs Auktioner

Open auction lot
41
low priority

Acquisition position

Current all in cost

976.68 SEK
Current bid or estimate400.0 SEK
Modelled discount37.3%
Liquidity score84%

Potential market value

Specialist value interval

900 to 2374 SEK
Value confidence74%
Comparable sales30

Evidence strength

40%
Identity confidence32%
Visual match0%
External references12

Market anomaly

43%
Information gap67%
Potential undervaluation37.3%

Risk profile

13%
Authenticity risk13%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied
  • Large gap to recent market history

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

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

Vikt inkl. fylld fot ca 279 gram. Höjd ca 11 cm. Modell 431 C.

Identity resolution

Artist and maker hypotheses

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

9 candidates
1 independent sources

Designed by Arthur Silver (English, 1853–1896) France, Mulhouse

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

33% combined confidence
1 independent sources

Designed by Arthur Silver (English, 1853-1896) Produced by Silver Studio Sold by Liberty & Co. Ltd. France, Alsace

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

25% combined confidence
1 independent sources

Designed by Silver Studio, 1880–1963 Produced by Liberty and Co., founded 1875 England, London

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

25% combined confidence
1 independent sources

Arthur Dove (American, 1880–1946)

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

25% combined confidence
1 independent sources

Barbour Silver Co., Division of International Silver Company (American, 1892–1931) Chasing by Christopher M. Whalen (American, 1867–1932) Meriden, Connecticut

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

25% combined confidence
1 independent sources

George Inness (American, 1825–1894)

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

25% combined confidence
1 independent sources

Felix Gonzalez-Torres American, born Cuba, 1957–1996

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

24% combined confidence
1 independent sources

Victor Dubreuil American, born France, 1842–after 1910

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

24% combined confidence
1 independent sources

James McNeill Whistler (American, 1834–1903)

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

Silver Sun

Arthur Dove (American, 1880–1946)

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

Coffee Set with Tray

Barbour Silver Co., Division of International Silver Company (American, 1892–1931) Chasing by Christopher M. Whalen (American, 1867–1932) Meriden, Connecticut

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

"Untitled" (Silver Beach)

Felix Gonzalez-Torres American, born Cuba, 1957–1996

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

A Silver Morning

George Inness (American, 1825–1894)

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

Silver Tanks

Arthur Dove (American, 1880–1946)

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

Fleurs Stylises

Designed by Arthur Silver (English, 1853-1896) Produced by Silver Studio Sold by Liberty & Co. Ltd. France, Alsace

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

Ayesha

Designed by Silver Studio, 1880–1963 Produced by Liberty and Co., founded 1875 England, London

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

Grey and Silver: Old Battersea Reach

James McNeill Whistler (American, 1834–1903)

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

Violet and Silver—The Deep Sea

James McNeill Whistler (American, 1834–1903)

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

One Dollar Silver Certificate

Victor Dubreuil American, born France, 1842–after 1910

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

Trouville (Grey and Green, the Silver Sea)

James McNeill Whistler (American, 1834–1903)

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

Panel

Designed by Arthur Silver (English, 1853–1896) France, Mulhouse

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
804866%4413.0 SEKidentity 100%, material 45%, size 62%, title 77%, hallmarks 45%, weight 62%
1255253%200.0 SEKidentity 59%, material 45%, size 62%, title 47%, hallmarks 45%, weight 62%
1450251%2000.0 SEKidentity 55%, material 45%, size 62%, title 44%, hallmarks 45%, weight 62%
87751%1909.0 SEKidentity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62%
351651%400.0 SEKidentity 53%, material 45%, size 62%, title 48%, hallmarks 45%, weight 62%
1521351%2374.0 SEKidentity 53%, material 45%, size 62%, title 46%, hallmarks 45%, weight 62%
1424351%2018.0 SEKidentity 53%, material 45%, size 62%, title 45%, hallmarks 45%, weight 62%
1431651%1919.0 SEKidentity 53%, material 45%, size 62%, title 45%, 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.

Open command centerDashboard Open specialist model labModels Show extreme candidatesFilter Show priority reviewsFilter