| 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
network of watch sites
Trending Comments
Longines Caliber L836.6
The differenece is the beat rate. 3Hz vs 5Hz. 6 beats/s vs 10 beats/s.
Orient Caliber F6922
I've had my Mako and Ray Orient watches with these calibers, I guess. Their performance…
Invicta Caliber JSD-006ZY
Apart from the fact, that there is no further information about this caliber anywhere, it…
Seiko Instruments (SII) Caliber VH31
the VH-31 movement coupled with solar or kinetic in a Seiko watch would sell like…
Miyota/Citizen Caliber 9051
I have the 9051 in my Fujitsubo, it appears to be within 3 seconds. I'll…
Active Caliber Listings
It might be a Chinese Standart-movement aka Tong Ji aka 7120 / SS7 with an…
Thank you for sharing your experience with the community. If possible, please submit images of…
Apart from the fact, that there is no further information about this caliber anywhere, it…
This £80 lorus has the y676c with Japan on the rotor
Minute hand on some ETA's 2-hand quartz movements run every 20 secs so that the…