Give the unknown its own field
A missing measurement is information about the record. Treat it as unresolved rather than filling the gap with a reasonable-sounding estimate from a similar product.
Foger is the subject of this collection. Use the named product records below to distinguish the models and components.
What this collection establishes
The source links identify published names and images. This publication does not claim an independent physical test, an authenticity decision or a legal status determination.
Questions to retain
Which field remains unsupported by the available record?
Useful documentation can end with an unanswered question.