Component record · Case
Dust Cover (Cuvette)
VerifiedAn inner metal cover, also called a cuvette, fitted over the movement beneath the outer case back, chiefly in pocket watches.
What it does
Provides an additional barrier against dust and moisture reaching the movement, independent of the outer case back.
How it works
The dust cover (cuvette) is a shaped metal cap that snaps or hinges over the movement, sitting between it and the outer case back, so opening the outer back does not immediately expose the movement to dust or handling damage.
It is frequently engraved with maker's details, case numbers, or servicing marks made by watchmakers over the watch's working life, making it a useful secondary source of provenance information.
Evolution
Common in quality pocket watch cases historically; largely absent from modern wristwatches, where a single case back typically suffices given tighter tolerances and gasket sealing.
Known variations
- Hinged dust cover
- Snap-fit dust cover
- Engraved presentation dust cover
Identification for collectors
- A separate inner metal cap encountered when opening a pocket watch case back, often bearing engraved service marks or maker information
Common failure modes
- Dents or splits in thin cuvette metal from repeated opening
- Loss of the dust cover over a watch's working life, leaving the case back only
Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- Britten, F. J., Old Clocks and Watches and Their Makers
Where sources disagree, the disagreement is stated rather than resolved silently.