Miyota Caliber 8218
|Diameter||11 1/2”’ (26mm overall)|
|Vibrations Per Hour
|Lift Angle||49 degrees|
|Functions||Hours, minutes, small seconds (at 4:00), date calendar|
|Country of Manufacture||Japan|
||Reverie Sea-Spirit, SD-09 UFO Spacecraft (add yours in the comments below)|
The Miyota caliber 8218 is an automatic movement found in some micro-watch brands.
Miyota states that the caliber 8218 keep accuracy within -20～+40 seconds/day, with a posture difference of under 50 seconds/day.
The power reserve is about 42 hours. 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).
Date vs No Date
The caliber 8218 has a date at 3:00. The caliber 8245 is the same as the 8218 but without a date complication.
Miyota 8218 vs 8219
Similar to the caliber 8218, there is also a caliber 8219. They are essentially the same with exception to a 24 hour hand on the 2819 at 9:00.
The example pictured below is from the crowdfunded SD-09 UFO Spacecraft watch. Please talk about your experience with the Miyota caliber 8218 in the comments below.