Omega Caliber 8521

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