Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. document genres
7. [documents by function]
8. [identifying markings and symbols]
9. marks (identifying markings)
10. [marks by location or context]

Anotations

Scope note:

Refers to zigzag or wriggled grooves found on the underside of silver pieces (Continental or Scottish but rarely English) formed when samples of the metal were taken for assaying. The marks often resemble the letter N or Z but no significance can be attached to their form.