Miyota (watch movement manufacturer)

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

The Miyota 8215 is an entry level non-hacking 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.[2][3]

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 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).[4][5]

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 Bulova, MVMT and Skagen.[6]