Miyota Caliber 8218
|Vibrations Per Hour
|Shock System||(add to comments below)|
|Functions||Hours, minutes, small seconds (at 4:00), date calendar|
|Country of Manufacture||Japan|
||Reverie Sea Spirit (add more in the comments below)|
There is a Miyota caliber 8218 and 8219. They are essentially the same with exception to a 24 hour hand on the 2819 at 9:00. Miyota states that these calibers will run for more than 40 hours and keep accuracy within -20～+40 seconds/day, with a posture difference of under 50 seconds/day.
As for getting the full power reserve, Miyota says: The mainspring becomes fully winded by rotating the ratchet wheel 7.5 times (turning the crown 40 times).