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RING MED PÄRLOR OCH DIAMANTER.

Ring Med Pärlor Och Diamanter · Jewelry · Björnssons Auktionskammare

Open auction lot
29
low priority

Acquisition position

Current all in cost

3375.0 SEK
Current bid or estimate3000.0 SEK
Modelled discount22.2%
Liquidity score88%

Potential market value

Specialist value interval

2038 to 7500 SEK
Value confidence69%
Comparable sales30

Evidence strength

36%
Identity confidence27%
Visual match0%
External references12

Market anomaly

18%
Information gap57%
Potential undervaluation22.2%

Risk profile

8%
Authenticity risk8%
Condition risk6%

Investigation rationale

Why this may be worth considering

  • maker or artist identity supplied

Decision guardrails

What must be verified

  • missing marks
  • missing metal
  • missing weight
  • missing measurements

Visual laboratory

Add and compare research imagery

Object record

Known facts and missing information

ArtistRing Med Pärlor Och Diamanter
MakerMissing
MediumMissing
MaterialsMissing
Dimensions? × ? × ? cm
WeightMissing g
YearMissing
EditionMissing
MarksMissing
ConditionBruksslitage, repor.
ProvenanceMissing
Modeljewelry_specialist 2.0.0

Två odlade pärlor, diameter ca 8 mm, samt fyra små enkelslipade diamanter fattade i 14k guld, storlek 17 1/4, vikt ca 6,6 gram.

Identity resolution

Artist and maker hypotheses

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

5 candidates
1 independent sources

Robert Frank American, born Switzerland, 1924–2019

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

25% combined confidence
1 independent sources

Designed by Narcissa Niblack Thorne American, 1882-1966

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

25% combined confidence
1 independent sources

Chicopee Falls, Massachusetts, United States

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

25% combined confidence
1 independent sources

Greek

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

24% combined confidence
1 independent sources

Egyptian

Visual 0% · Name 30% · Marks 25% · Material 40%

23% 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

Ring with a Scarab Bezel

Egyptian

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

A11: Rhode Island Parlor, c. 1820

Designed by Narcissa Niblack Thorne American, 1882-1966

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

A15: New York Parlor, 1850-70

Designed by Narcissa Niblack Thorne American, 1882-1966

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

A9: Massachusetts Parlor, 1818

Designed by Narcissa Niblack Thorne American, 1882-1966

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

A21: Virginia Parlor, 1758-87

Designed by Narcissa Niblack Thorne American, 1882-1966

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

A33: "Middletown" Parlor, 1875-90

Designed by Narcissa Niblack Thorne American, 1882-1966

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

'Crazy Quilt' Parlor Throw

Chicopee Falls, Massachusetts, United States

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

A30: Georgia Double Parlor, c. 1850

Designed by Narcissa Niblack Thorne American, 1882-1966

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

A2: New Hampshire Parlor, c. 1710

Designed by Narcissa Niblack Thorne American, 1882-1966

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

Tattoo Parlor

Robert Frank American, born Switzerland, 1924–2019

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

A4: Connecticut Valley Tavern Parlor, c. 1750

Designed by Narcissa Niblack Thorne American, 1882-1966

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

Finger Ring Depicting Aphrodite

Greek

0% similarityCheck object rights; API metadata is open

Comparable logic

Specialist model explanation

Comparable IDMatchPriceReasons
1364162%3500.0 SEKidentity 86%, material 45%, size 62%, title 86%, hallmarks 45%, weight 62%
1186258%32500.0 SEKidentity 76%, material 45%, size 62%, title 62%, hallmarks 45%, weight 62%
83350%2038.0 SEKidentity 45%, material 45%, size 62%, title 100%, hallmarks 45%, weight 62%
1357750%1500.0 SEKidentity 51%, material 45%, size 62%, title 51%, hallmarks 45%, weight 62%
1988450%2920.0 SEKidentity 45%, material 45%, size 62%, title 86%, hallmarks 45%, weight 62%
1835250%2600.0 SEKidentity 45%, material 45%, size 62%, title 86%, hallmarks 45%, weight 62%
1780450%3700.0 SEKidentity 45%, material 45%, size 62%, title 86%, hallmarks 45%, weight 62%
1798550%1346.0 SEKidentity 45%, material 45%, size 62%, title 86%, 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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