Maker relationship
Wrong maker or manufacturer
A name may identify the brand owner, designer, publisher, importer, wholesaler, retailer, licensor, distributor, component supplier or previous owner rather than the physical maker.
Better practice
Use the narrowest relationship the evidence supports: manufactured by, designed by, published by, distributed by, retailed by, licensed by, attributed to or associated with.
Product identity
Wrong model, type or product
Related products may share overall form while differing in dimensions, mould details, hardware, internal construction, typography, catalogue number, colour combination, accessory set or regional designation.
Better practice
Identify the feature that separates candidates rather than relying on the feature they share.
Chronology
Wrong date or period
Style can be revived, copied or retained. Patent, copyright, design, release, manufacture, reissue and ownership dates are not interchangeable.
Better practice
Record what the date actually refers to before using it to date the specimen.
Publication or production
Wrong edition, printing or run
Later issues may preserve the main artwork and design while changing printer's keys, legal text, price, publisher address, paper, binding, matrix information, advertisements or packaging marks.
Better practice
Define terms such as first edition, first printing, first state and first regional issue explicitly.
Variation
Wrong variant
A visible difference may result from production, but it may also be ageing, fading, damage, repair, owner modification, printing misregistration, batch inconsistency or photographic colour distortion.
Better practice
Require a stable diagnostic difference, repeat specimens, production logic and consistent associated features before formalising a variant.
Substance
Wrong material
Paint, plating, veneer, coatings, fills and laminates can conceal the underlying structure. Resin may be called ivory; plated alloy may be called solid silver; celluloid may be called Bakelite.
Better practice
Move from visual inspection to magnification, construction analysis and non-destructive specialist testing as consequence and uncertainty increase.
Geography
Wrong country or place
A geographical name may indicate manufacture, assembly, company headquarters, patent jurisdiction, export destination, importer, retailer, style or subject depicted.
Better practice
Distinguish manufactured in, assembled in, printed in, designed in, distributed from and marked for sale in.
Use
Wrong original function
Objects removed from context are often named from resemblance. Decorative fittings, industrial parts, packaging components, gaming pieces, religious objects and domestic tools are especially vulnerable.
Better practice
Test function against wear, attachment points, residues, dimensions, historical images and documented parallels.
Completeness
Wrong completeness status
A set can look complete because its surviving parts fit, yet still lack originally supplied material. A genuine issue may also be wrongly called incomplete by comparison with a different region or configuration.
Better practice
Judge completeness against the correct issue, market and documented configuration.
Ensemble integrity
Wrong relationship between components
A box, object, manual, insert, certificate and accessory can each be genuine while the assembled group is historically incorrect.
Better practice
Describe whether the group is factory-original, retailer-bundled, period-replaced, collector-assembled, restored with donor parts or mixed by region.
Marks and labels
Wrong interpretation of an inscription
A mark may be a maker's mark, retailer stamp, assay mark, ownership mark, mould code, inspector mark, inventory number, repair label, later annotation or deceptive addition.
Better practice
Transcribe and describe the mark before interpreting it. 'Marked Smith & Co.' is safer than 'made by Smith & Co.' until its role is established.
Authenticity
Wrong authenticity conclusion
Identification and authentication overlap but are not identical. A genuine object can be assigned to the wrong issue, and a counterfeit can be correctly identified as a counterfeit version of a known product.
Better practice
Keep the classification claim separate from the judgement that the specimen genuinely belongs to that claimed category.