$20.00
You Saved
The Generic Omega Calibre 8520 Winding Stem is an aftermarket replacement part for the Omega 8520 automatic movement. It connects the crown to the keyless works, enabling smooth manual winding and precise time-setting. This stem offers a reliable, cost-effective alternative to genuine OEM components.
Compatible with Calibre 8520 and 8521 movements (same keyless works)
Supports 3 crown positions: winding, date, and hacking time-setting
Made of durable stainless steel with precision-ground threads
Drop-in replacement, no modification required
Affordable alternative to scarce genuine parts
| Parameter | Value |
|---|---|
| Compatible Calibers | Omega 8520, 8521 |
| Crown Positions | 3 |
| Material | Stainless steel |
| Movement Size | 20.00 mm diameter, 5.30 mm thick |
| Frequency | 25,200 vph (3.5 Hz) |
| Power Reserve | ~50 hours |
| Product Type | Aftermarket / Generic |
Replacement of worn or broken stems in Omega 8520/8521 watches (Constellation 27mm, Seamaster Planet Ocean 38mm, Ladymatic De Ville)
Professional servicing and independent watch repair
Restoring crown function without expensive OEM parts
Q1: Is this an authentic Omega part?
No, it is a generic aftermarket replacement, not made by Omega.
Q2: Which calibers does it fit?
It fits Omega Calibre 8520 and 8521 (both share the same keyless works).
Q3: Is the quality reliable?
Yes, when sourced from a reputable supplier, it meets good mechanical standards for routine service.
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.
