Use a firm metric ruler. Measure in a straight line from the top edge beside the neck to the lowest edge of the back. Do not include the button and do not follow the arching.
mm
This single value supplies the scale. The app derives the other body dimensions from the accepted square-on photograph.
Independent image-first assessment
Appraisal result
—/100 capture quality
Capture quality
Required views
Image alignment
Image clarity
Automatic body measurements
Scale reference
Bout measurements are image-derived estimates. The back length is the only manual measurement. Measurements are withheld when the outline or camera pose is unreliable.
Independent visual observations
Body outline and proportionsSuitable for established outline comparison. The three-instrument validation achieved a 3.348× repeat/different separation margin.
Corners, edgework and purflingCoarse geometry may support a conclusion; fine corner morphology is withheld because repeatability failed.
F-holesPosition, inclination, stems, eyes and wings are recorded for review. This channel is not yet allowed to determine attribution.
Scroll and pegboxFront and side morphology recorded. Comparison status: research channel.
Arching, wood and varnishVisible profile, colour, transparency, flame, wear and apparent antiquing can be described; varnish chemistry cannot be established from photographs.
MeasuredProvisionalWeak evidence withheld
Probable classification
Insufficient reference coverageCountry or school
Broad period pendingApproximate date
UndeterminedIndividual / workshop / trade
Not calculatedCalibrated confidence
Candidate maker or workshop shortlistNot issued until the relevant school has adequate authenticated reference coverage.
Supporting featuresThe report will list features that positively support each hypothesis.
Conflicting featuresConflicting channels remain visible rather than being averaged away.
The label, certificate and owner’s suggested maker have not influenced this image-first assessment.
Documentary evidence
Not yet combinedAdd labels, certificates, expert opinions and provenance only after the independent assessment.
Indicative valuation
PendingAuction range
PendingTrade purchase
PendingRetail range
PendingConfirmed-attribution value
Ranges unlock only when a defensible classification, condition assessment and dated comparable sales are available. The app must never manufacture a value from the label alone.
Recommended action
Specialist referral requiredReference coverage is currently insufficient for maker-level attribution. Preserve the photographs and supporting documents for expert review.
Documentary evidence
Added only after the image-first result
This information is stored separately so a label or owner belief cannot bias the initial visual assessment.
