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: MiyotaCaliber Number: 90S5Movement Type: AutomaticJewels: 24Vibrations Per Hour: 28,800 bphShock System: Citizen ParashockAccuracy: -10~+30sec/dayPower Reserve: 42 hoursWinding Direction: Bi-directionalHeight: 3.90mm
Functions: Stop second device, Automatic and hand winding, 3 Hands, Open-Heart Dial Compatibility: Compatible with all 28.5mm Seiko Dials (to cut off all 4 feet and use dial dots for installation) without date windows.