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This is a genuine Sellita SW1000-721 balance wheel, the core oscillating component that regulates the timekeeping rate of a mechanical movement. Manufactured in Switzerland and brand new, it is used to repair or replace a damaged or out-of-adjustment balance wheel in Sellita SW1000 series calibers.
Genuine Sellita Part – Produced by Sellita SA in Switzerland, not a copy or generic component.
Made in Switzerland – Crafted with Swiss precision standards.
Compatible Movement – Designed specifically for Sellita SW1000 series calibers, part number SW1000-721.
Brand New – Unused factory-original stock, no wear or performance loss.
Core Timing Component – Works with the hairspring to determine accuracy; requires proper adjustment after installation.
| Parameter | Details |
|---|---|
| Part Type | Balance Wheel |
| Compatible Movement | Sellita SW1000 series (including SW1000-721) |
| Origin | Switzerland |
| Manufacturer | Sellita SA (genuine) |
| Condition | New |
1. Is this a genuine Sellita balance wheel?
Yes. The product clearly states “Genuine SELLITA” and “Made in Switzerland”, meaning it is an authentic Sellita factory part, not a third-party copy.
2. Which movements is this balance wheel compatible with?
It is designed for the Sellita SW1000 series calibers, part number SW1000-721. Different variants (e.g., with or without screws) should be verified against the parts diagram. Not compatible with ETA or other brands unless dimensions are identical – professional judgment is required.
3. Will my watch keep correct time after replacing just the balance wheel?
After replacing the balance wheel, you must also inspect the hairspring (replace if damaged) and perform dynamic balance adjustment and regulation (via the regulator or balance screws). A professional watchmaker should handle the entire process.
4. What should I pay attention to during installation?
Balance wheels are extremely delicate. Avoid shocks and static. You may need to transfer the hairspring from the old wheel or fit a new one. Endshake and pivot alignment must be checked. Do not attempt without proper training.
5. Is there any warranty?
As a brand new genuine part, it typically comes with the supplier’s quality guarantee. Please check with your seller for specific warranty terms.
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