| Brand | Omega |
| Caliber Number | 8521 |
| Base Caliber |
8520 |
| In-House | Yes |
| Movement Type | Automatic |
| Jewels | 28 |
| Power Reserve | 50 hours |
| Vibrations Per Hour | 25,200bph |
| Hairspring | Silicon Si14 |
| Shock System | Nivachoc |
| Escapement |
Co-Axial |
| Functions | Hours. minutes, central seconds, date at 3:00 |
| Country of Manufacture | Switzerland |
| Known Models | DeVille Ladymatic (ref: 425.68.34.20.55.004) |
The Omega caliber 8521 is an in-house automatic movement found in ladies size Omega watches. This movement was released in 2010.
Omega 8520 VS 8521
There is a similar caliber 8520, with the main difference being that the 8521 is luxury finished with an 18K gold rotor.
In Omega’s Own Words:
Self-winding movement with Co-Axial escapement. Free sprung-balance system with silicon balance-spring. Automatic winding in both directions. Oscillating mass and balance bridge in 18 Ct red gold. Luxury finish with exclusive Geneva waves in arabesque
Video Manual:
Additional Resources:
- Read more: Testing Omega’s Seamaster Aqua Terra
- Video: George Daniels, The Master Rests
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