Replacement Case-Back Gasket Compatible with Omega Seamaster De Ville 39.5mm

Restore the seal between your watch case and case back with this replacement case-back gasket, designed for selected Omega Seamaster De Ville 39.5mm watches.

Measuring 32.5 × 0.58 × 0.9mm, the gasket helps protect the movement from moisture, dust, and everyday contaminants by supporting a secure case-back seal when installed correctly. It is suitable for replacing a worn, hardened, flattened, stretched, cracked, or damaged gasket during professional watch servicing or restoration.

Compatibility may vary between complete watch references, case designs, and production years. Please confirm your full watch reference and compare all gasket dimensions, its profile, and the case-back seating groove with the original component before ordering.

Professional installation is strongly recommended. A new gasket alone does not guarantee water resistance. The completed watch must pass appropriate pressure testing before exposure to water.

(Compatible third-party replacement part—not manufactured, sponsored, or endorsed by Omega.)

Product Specifications
Product Type: Replacement Case-Back Gasket
Gasket Dimensions: 32.5 × 0.58 × 0.9mm
Compatibility:  Omega Seamaster De Ville
Watch Size: 39.5mm
Application: Case-Back Sealing, Watch Servicing, and Restoration
Installation: Professional Installation and Pressure Testing Recommended

Don’t see your watch listed?
Our inventory is always expanding. Email info@wrwatches.com with your complete model, reference number, or gasket measurements, and we’ll do our best to locate the correct replacement gasket for your watch.