JOSEF FRANK. Burk, Firma Svenskt Tenn, tillverkad vid Reijmyre eller Gullaskruf, gjuten, ribbad form, indigofärgad glasmassa.

Josef Frank · Silver and metalware · Stockholms Auktionsverk Magasin 5

Open auction lot

priority review

Acquisition position

Current all in cost

1500.0 SEK

Current bid or estimate1000.0 SEK

Modelled discount61.4%

Liquidity score84%

Potential market value

Specialist value interval

2204 to 8006 SEK

Value confidence78%

Comparable sales30

Evidence strength

79%

Identity confidence90%

Visual match90%

External references0

Market anomaly

69%

Information gap67%

Potential undervaluation61.4%

Risk profile

Authenticity risk8%

Condition risk18%

Investigation rationale

Why this may be worth considering

strong visual recurrence or reference image match
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
Strong image recurrence
Large gap to recent market history
listing has major information gaps while independent identity evidence is comparatively strong

Decision guardrails

What must be verified

condition wording: nagg
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

ConditionSmärre avlagringar invändigt, små nagg. Saknar lock.

ProvenanceMissing

Modelsilver_metalware_specialist 2.0.0

Höjd 12,5, längd 15,5 cm.

Identity resolution

Artist and maker hypotheses

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

0 candidates

Research pending

No identity hypotheses yet

Run global research after adding the clearest available front, back, marks and label images.

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

0 references

Research pending

No external references stored

Run global research to search museum and authority collections.

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
9450	66%	3208.0 SEK	identity 100%, material 45%, size 62%, title 79%, hallmarks 45%, weight 62%
17983	66%	1205.0 SEK	identity 100%, material 45%, size 62%, title 73%, hallmarks 45%, weight 62%
3683	66%	500.0 SEK	identity 100%, material 45%, size 62%, title 75%, hallmarks 45%, weight 62%
20847	66%	11450.0 SEK	identity 100%, material 45%, size 62%, title 70%, hallmarks 45%, weight 62%
11497	66%	3100.0 SEK	identity 100%, material 45%, size 62%, title 69%, hallmarks 45%, weight 62%
20021	66%	8000.0 SEK	identity 100%, material 45%, size 62%, title 67%, hallmarks 45%, weight 62%
4835	66%	4200.0 SEK	identity 100%, material 45%, size 62%, title 70%, hallmarks 45%, weight 62%
16886	66%	2000.0 SEK	identity 100%, material 45%, size 62%, title 66%, 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.