The Miyota 8215 (and its other variants such as the 8205) is a Japanese automatic wristwatch movement that is used by many watch makers. Miyota is part of the Citizen group of companies.
The Miyota 8215 is a non-hacking twenty-one (21) jewel three-hand with date 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. 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).
Below are some technical information useful for the understanding of the movement.
My watches that uses the movement (or its variants) are:
I have not had any problems with the mechanism throughout the years. From a practical point of view, the accuracy is more then sufficient for normal timekeeping duties although some may argue its 'lack' of accuracy compared to other movements from Switzerland and Japan.
The Miyota 8215 is a non-hacking twenty-one (21) jewel three-hand with date 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. 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).
Below are some technical information useful for the understanding of the movement.
My watches that uses the movement (or its variants) are:
- MWF-Gruppo Gamma LE Watch;
- Citizen Promaster Autozilla 1000m Titanium Divers Watch NH6930-09F (NH6931-06E);
- Citizen NY0040 200m Promaster Diver; and
- Citizen Automatic NY602151E Divers' Watch
I have not had any problems with the mechanism throughout the years. From a practical point of view, the accuracy is more then sufficient for normal timekeeping duties although some may argue its 'lack' of accuracy compared to other movements from Switzerland and Japan.