Omega Seamaster De Ville Green Case Back Gasket 0.58mm x 0.9mm
$1.77
Omega Case Back Gasket green waterproof rubber seal for compatible Seamaster and De Ville watch repair projects. Available in multiple sizes with a 0.58mm x 0.9mm profile for case back sealing and maintenance.
Omega Case Back Gasket for Seamaster and De Ville Watches
Omega Case Back Gasket is an aftermarket green waterproof rubber seal designed for compatible Omega Seamaster and De Ville watch repair projects.
This gasket is used for case back sealing, bottom cover repair, watch maintenance, and waterproof service preparation.
It is suitable for replacing old, hardened, flattened, cracked, loose, missing, or damaged case back gaskets during repair and restoration work.
The case back gasket is an important sealing component inside the watch case.
It sits between the case back and the case body, helping reduce dust, moisture, sweat, and external contamination from entering the movement area.
When the original gasket becomes aged or compressed, the case back may not seal correctly.
Replacing it with a suitable compatible gasket can help restore a cleaner case back fit and improve repair reliability.
Omega Case Back Gasket Compatibility
This Omega Case Back Gasket is intended for compatible Omega Seamaster, De Ville, and related watch repair projects.
The gasket is green and has a listed profile of approximately 0.58mm thickness and 0.9mm height.
Because different Omega references, case diameters, gasket grooves, and case back structures may vary, please confirm the correct size before ordering.
This product is a replacement case back gasket only.
It is not a complete watch case, not a case back, not a crown gasket, not a crystal gasket, not a movement part, and not a complete waterproofing kit.
If water resistance is required after installation, professional fitting and pressure testing are strongly recommended.
Main Features
Green case back gasket for compatible Omega watch repair projects
Suitable for Seamaster and De Ville style watch cases
Approximate profile: 0.58mm thickness x 0.9mm height
Available in multiple size options for different case back gasket requirements
Useful for replacing old, hardened, flattened, cracked, or missing gaskets
Helps support dust and moisture resistance when correctly installed
Suitable for watchmakers, repair shops, dealers, collectors, and advanced hobbyists
Available Size Options
This product is available in multiple size options.
Available sizes include 20mm, 20.5mm, 21mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, 24.5mm, 26mm, 27mm, 27.5mm, 28mm, 29mm, 29.5mm, 30mm, 30.5mm, 31mm, 31.5mm, 33.5mm, 34.5mm, 37mm, and 37.5mm.
Choosing the correct size is important because a gasket that is too large may twist or pinch.
A gasket that is too small may not seal properly.
Why Choose This Omega Case Back Gasket?
The Omega Case Back Gasket is a practical replacement part for watch repair and maintenance work.
Rubber gaskets naturally age over time.
They can become hard, flat, stretched, cracked, or deformed after repeated case opening, long-term wear, or exposure to moisture and heat.
When this happens, the gasket may no longer compress evenly inside the case back groove.
For repair shops, keeping multiple gasket sizes available can reduce service delays and improve repair efficiency.
For collectors and advanced hobbyists, replacing an old gasket during case service is a useful step when maintaining a watch.
Since the gasket is a small but important sealing part, it should be inspected whenever the case back is opened.
Size Selection Guide
Before ordering, measure the original gasket carefully and check the case back groove.
A caliper is recommended for checking the gasket diameter, thickness, and height.
If the original gasket is stretched, flattened, broken, or missing, compare the watch case measurements and product option details carefully before selecting a size.
If you are not sure which size fits your watch, prepare clear photos of the case back, gasket groove, original gasket, and watch reference before contacting us.
Accurate photos and measurements can help reduce selection mistakes and improve the chance of choosing the correct replacement gasket.
Installation Guidance
Open the case back carefully using proper watch repair tools.
Remove the old gasket without scratching the case back or gasket groove.
Clean the gasket groove and sealing surface before fitting the new gasket.
Compare the replacement gasket with the original part before installation.
Install the gasket evenly without twisting, stretching, or pinching it.
Close the case back carefully and check that the gasket remains seated correctly.
If water resistance is required, perform a professional pressure test after installation.
Waterproof Sealing Notice
A replacement case back gasket can help support sealing performance, but it does not guarantee water resistance by itself.
Final water resistance depends on the full condition of the case back, case body, gasket groove, crown, crown tube, crystal, case back pressure, and installation quality.
If the watch will be exposed to water, rain, sweat, or daily moisture, professional pressure testing should be performed after installation.
If the case back groove is damaged or the case has corrosion, replacing only the gasket may not fully restore water resistance.
Care and Handling
Handle the gasket with clean gloves, finger cots, or soft plastic tweezers.
Avoid touching the sealing surface with oily fingers, dirty tools, polishing compound, adhesive residue, or dust.
Any contamination on the gasket may affect sealing performance.
Store unused gaskets in a clean sealed bag or parts box away from heat, sunlight, chemicals, and sharp tools.
Do not stretch or compress the gasket before installation.
For valuable watches or customer repair work, installation should be completed by a qualified watch repair professional.
This external link is provided for general brand reference only.
Important Notice
This product is an aftermarket green case back gasket for compatible Omega Seamaster and De Ville watch repair projects.
It is not manufactured, sponsored, endorsed, or approved by Omega SA.
Omega, Seamaster, De Ville, and related model names are trademarks of their respective owner.
Watch, case back, case, movement, screws, tools, and other parts are not included unless clearly stated.
Product Summary
The Omega Case Back Gasket is a green waterproof rubber seal for compatible Seamaster, De Ville, and related Omega watch repair projects.
With multiple size options and a listed 0.58mm x 0.9mm profile, it is suitable for case back sealing, gasket replacement, maintenance, and restoration work.
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