Component record · Case
Crystal Gasket
Partially verifiedA seal between crystal and bezel.
What it does
Helps exclude dust and moisture at the crystal joint.
How it works
Compressed when the crystal is pressed or the bezel tightened, forming a seal.
Evolution
Introduced with water-resistant case design and refined since.
Known variations
- Tension-ring gasket
- Separate O-ring
Identification for collectors
- A hazy crystal edge often indicates a perished gasket.
Common failure modes
- Hardening with age
- Compression set
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
- de Carle, D., Practical Watch Repairing
- de Carle, D., Watch and Clock Encyclopedia
- Daniels, G., Watchmaking
Where sources disagree, the disagreement is stated rather than resolved silently.