Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Measuring Devices (hierarchy name)
5. measuring devices (instruments)
6. [measuring devices for extent]
7. timepieces
8. [timepieces by function]

Anotations

Scope note:

Certain types of precision time pieces. Originally referred to strongly built precision timekeeping devices especially designed for use on ships; now also used for extremely accurate wrist watches or pocket watches.