NCR, bicycles, aviation, tools, patents, factory objects, advertising, and worker material culture.
- Describe the object without assuming identity.
- Record measurements, materials, construction, marks, surface, condition, and alterations.
- Separate what is observed from what is reported.
- Compare documented examples with matching details.
- State attribution and date at the strength the evidence supports.
Ohio attribution needs a real link
An Ohio seller, estate, or auction location does not prove Ohio manufacture. Look for maker, retailer, business, family, property, or documentary evidence.
Physical evidence to record
Ohio Research Trail
Use marks, names, addresses, directories, newspapers, probate records, maps, museum collections, and local historical societies.
Condition and change
Separate age from condition. A genuinely old object may be heavily altered; a clean object may retain strong originality. List repairs, replaced parts, refinishing, reupholstery, inpainting, fills, cracks, losses, mounting, trimming, drilling, and cleaning.
Value research
Use matched completed sales where available. Compare identity, period, maker or region, dimensions, material, originality, condition, provenance, completeness, sale date, venue, buyer premium, and shipping obligations. Do not average unlike objects.
Compare current collector listings
Use listings to study construction, dimensions, maker marks, regional details, repairs, provenance claims, and market supply. Asking prices are research leads, not completed-sale evidence.
Search eBay collector listings