Miyota 90S5 Premium Automatic Watch Movement

The Miyota 90S5 is a premium Japanese movement widely used in top-tier microbrands for its durability and slender profile.

Measuring only 3.9mm thick, it is 30.8% slimmer than the Seiko NH35, enabling sleeker watch designs. With a higher accuracy and a superior beat rate of 28,800bph which gives the second hands a smoother sweep, the Miyota 90S5 offers a premium option for watchmakers aiming to craft high quality timepieces.

The Miyota 90S5 also has an open-heart design (aka open balance wheel) on the dial around the 5:00 position which allows for builds with open heart dials!

Comes supplied with watch stem.

Specifications:
Manufacturer: Miyota
Caliber Number: 90S5
Movement Type: Automatic
Jewels: 24
Vibrations Per Hour: 28,800 bph
Shock System: Citizen Parashock
Accuracy: -10~+30sec/day
Power Reserve: 42 hours
Winding Direction: Bi-directional
Height: 3.90mm
Functions: Stop second device, Automatic and hand winding, 3 Hands, Open-Heart