A familiar model name does not guarantee that every example uses the same material. Manufacturers can retain a name while changing components, finishes or construction.
Begin with the particular object’s documented version and date range. Compare technical descriptions from the corresponding period where available. Avoid assigning a material from a modern listing to an older copy solely because the names match.
In an invented catalogue exercise, an early description specifies a wooden handle while a later one describes a moulded handle. The change belongs to the documented versions. It does not prove the exact material of an unexamined object between those dates.
Make a table of name, version evidence, component and stated material. Use the source’s wording and mark ambiguous descriptions rather than translating them into a more precise claim than the record supports.
Visual inspection can identify questions, but appearance alone may not resolve material composition. Do not apply heat, solvents or destructive tests to an object as an improvised identification method.
The resulting history may describe continuity in branding alongside change in manufacture. Keeping those two threads visible prevents a product name from becoming a shortcut that erases the very material variation a collection can help reveal.
Illustration selected from this site’s existing collection.