8521

About the Omega 8521

The 8520 is the co-axial caliber for ladies' and mid-size cases, with a free-sprung balance, a silicon balance spring, bidirectional winding, 28 jewels, a 50-hour reserve and a beat of 25,200 vph. The 8521 changes nothing mechanical: the rotor and the balance bridge are made in red gold so that the movement seen through a display back matches the case around it. Omega does the same with the 8501 and the 8807.

In the library it sits under 37 Ladymatic references, the 34 mm model in red or yellow gold and two-tone, 26 Constellations at 27 mm and 31 mm, 19 Aqua Terras and 4 Planet Oceans at 37.5 mm. The 34 mm case is the most common at 50 references, then 27 mm at 16 and 31 mm at 10.

The 8700 is the Master Chronometer movement that took over the smallest cases in 2018.