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This is a high‑quality watch crown gasket set containing 1,600 pieces across 80 different sizes, with outer diameters ranging from 1.0 to 4.0mm and inner diameters from 0.4 to 2.8mm, made of black rubber. Designed for watchmakers and enthusiasts, it replaces aged, hardened, or damaged O‑rings inside watch crowns to restore water resistance. As a practical repair assortment, it covers most common crown gasket sizes found in Swiss, Japanese, and Chinese watches – an essential addition to any professional service bench or DIY toolkit.
1,600 Pieces, 80 Sizes – Covers a wide range, eliminates frequent reordering.
Full Size Coverage – Outer diameter 1.0–4.0mm, inner diameter 0.4–2.8mm, fits most watch crowns.
Quality Rubber – Black nitrile or silicone rubber, oil‑resistant, aging‑resistant, good elasticity.
Restores Water Resistance – Replaces aged or damaged crown gaskets to restore daily water resistance.
Professional Repair Assortment – Suitable for Swiss, Japanese, and Chinese watches; for watchmakers and DIYers.
| Parameter | Details |
|---|---|
| Set Contents | 1,600 rubber O‑rings |
| Number of Sizes | 80 different sizes |
| Outer Diameter Range | 1.0 mm – 4.0 mm |
| Inner Diameter Range | 0.4 mm – 2.8 mm |
| Material | Black rubber (nitrile or silicone) |
| Function | Replaces crown internal O‑rings to restore water resistance |
| Compatible Watches | Common Swiss, Japanese, Chinese brands |
1. How do I choose the correct gasket size?
Measure the outer and inner diameter of the original crown gasket (or the groove inside the crown), then select the closest size from the set.
2. Do rubber gaskets age quickly?
All rubber ages over time. This set uses quality aging‑resistant rubber, with a typical lifespan of 2-3 years. Replace during routine service.
3. Will the original water resistance be restored after installation?
Proper installation together with other seals (crystal, case back) can restore everyday water resistance (e.g., 30-100m). A water resistance test is advised.
4. How do I install the gasket?
Use tweezers to place the gasket into the crown‘s groove, ensuring it is flat and not twisted. Apply a small amount of silicone grease for better sealing.
5. Does this set fit all watches?
It covers most common crown sizes. Very small or very large sizes may not be included. Check your original gasket dimensions before purchase.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
