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This is a generic balance stop spring designed for Rolex Caliber 2130 and 2135 movements, with part number 2135-245. This spring is a critical component of the Rolex movement’s stop-seconds function. When the crown is pulled to the time-setting position, the spring contacts and stops the balance wheel, allowing for precise time synchronization.
As a generic replacement for the genuine spring, it effectively restores the stop-seconds function and is an ideal choice for movement service and repair.
Generic Replacement – Designed for Rolex 2130/2135 movements; non-original but matches dimensions and tension.
Stop-Seconds Core – Brakes the balance wheel when the crown is pulled out for precise time setting.
Precision Manufactured – Made of quality spring steel for stable and durable tension.
Cost-Effective – More affordable than genuine parts for movement service or repair.
Direct Replacement – Same mounting position and method as the original; no modification needed.
| Parameter | Details |
|---|---|
| Part Name | Balance stop spring |
| OEM Reference | Rolex 2135-245 |
| Compatible Movements | Rolex Caliber 2130, 2135 |
| Material | Spring steel |
| Function | Stop-seconds braking |
Rolex Caliber 2130 automatic (e.g., Datejust models with 2130)
Rolex Caliber 2135 automatic (e.g., Datejust, Lady-Datejust)
Replacement of aged or deformed stop spring during full movement service
Repair of non-functioning or intermittent stop-seconds
1. Is this a genuine Rolex spring?
No. It is a generic aftermarket replacement, non-original, but exactly matches the 2130/2135 movement.
2. What are the symptoms of a faulty stop spring?
Symptoms: the second hand continues running when the crown is pulled out (stop-seconds fails), or intermittent stop-seconds function.
3. What should I pay attention to during installation?
Use fine tweezers to place the tiny spring, ensuring one end engages the bridge slot and the other contacts the balance wheel when the crown is pulled. Professional installation is recommended.
4. Does this spring fit other Rolex calibers?
Designed specifically for 2130/2135. Other calibers (e.g., 3135, 3235) have different stop-seconds mechanisms – do not mix.
5. When should the spring be replaced?
If stop-seconds fails and the keyless works are fine, replace the spring. Check for deformation, breakage, or loss of tension.
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