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Aftermarket balance stop spring engineered for Rolex RLX Calibres 1565, 1570, 1575 and 1580 (Ref. 1570-8115), precision-formed to match the original keyless works geometry. Crafted to halt the balance wheel when the crown is pulled to the time-setting position (hacking function), enabling precise time synchronization. An ideal replacement for worn, fatigued, or broken original balance stop springs during movement servicing.
| Parameter | Value |
|---|---|
| Part Name | Balance Stop Spring |
| Part Number | 1570-8115 |
| Brand | Generic (Aftermarket) |
| Movement | Rolex RLX Calibre 1565 / 1570 / 1575 / 1580 |
| Function | Halts balance wheel for hacking/time-setting |
| Type | Aftermarket Replacement Part |
Q1: Is this a genuine Rolex part?
A: No — this is an aftermarket balance stop spring for Rolex RLX (Ref. 1570-8115). It is not manufactured by Rolex SA.
Q2: What movements does it fit?
A: This balance stop spring fits the Rolex RLX Calibre 1565, 1570, 1575 and 1580 movements. Please confirm your movement model before purchasing.
Q3: What does the balance stop spring do?
A: It halts the balance wheel when the crown is pulled to the time-setting position (hacking function), allowing precise second-hand synchronization.
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