Miyota (watch movement manufacturer)

Mechanical movements

Miyota produces various 'standard' and 'premium' grade mechanical movements for automatic wristwatches.

The Miyota 8215 is an entry level non-hacking-earlier versions twenty-one jewel three-hand with date automatic wristwatch movement with a uni-directional winding system (left rotation) with an accuracy of -20 to +40 seconds per day, and a power reserve of over 40 hours. It allows hand winding. The date window may be placed at the 3 o'clock position (cal. 8215-33A) or at 6 o'clock (cal. 8215-36A). The diameter of the movement is 26 mm and the thickness is 5.67 mm. It beats at 21,600 BPH or 3 Hz (6 half-cycles per second). The movement has a 49° lift angle.^[3][4]

The Miyota 9015 is a more sophisticated hacking twenty-four jewel three-hand with date automatic wristwatch movement with a uni-directional winding system (left rotation). The relatively slim height (3.90 mm thick, making it more suitable for thinner watch designs) 9015 automatic movement has a beat rate of 28,800 BPH (= 4 Hz), 51° lift angle, 24 jewels and features (automatic) winding, a ≥42 hours power reserve, manual winding and a hack function (stopping the movement of the second hand). The static accuracy rating is −10 to +30 seconds per day (23±2 °C).^[5][6]

Electric movements

Miyota also produces various electric driven movements for quartz watches. These are categorized in standard, slim, small, multi-function, chronograph, and small second chronograph movements.These movements are used by a variety of watch brands such as Timex, Casio, Bulova, MVMT and Skagen.^[7]

Automatic movements

• Miyota Caliber 82S3: This automatic movement is a skeletonized option with a 24-hour indicator at the 9 o'clock position. The 24-hour hand moves with the main hands, functioning as a day/night or military time indicator.
• Miyota 8200 series: While the 82S3 is a specific example, other movements in the 8200 family can be adapted to include 24-hour functions, sometimes alongside other complications like a small seconds subdial (as seen in the 82S7).

Quartz movements

• Miyota Caliber 2415: This is a quartz movement that features a standard 24-hour display. It is a reliable, battery-powered option often found in watches that require high accuracy.^[8]