Miyota Caliber 8218 Watch Movement

Brand	Miyota (Citizen)
Caliber Number	8218
Base Caliber	Miyota 8215
Movement Type	Automatic
Lignes	11 1/2”’
Diameter	26mm
Casing Diameter	25.6mm
Height	5.67mm
Jewel	21
Vibrations Per Hour	21,600 bph
Power Reserve	40 hours
Lift Angle	49 degrees
Stem	065-212
Movement Holder	500-710
Hand Size	1.52mm / 1.0mm / 0.17mm
Anti-Shock System	Parashock
Hacking Seconds?	No
Hand-Winding?	Yes
Hand Count	3
Functions	Central hours; central minutes; small seconds subdial between 4:00 and 5:00; date at 3:00
Country of Manufacture	Japan
Known Models	Reverie Sea-Spirit, SD-09 UFO Spacecraft, AVI-8 Spitfire 300 (Add your watch in the comments below)

The Miyota caliber 8218 is an automatic movement found in many microbrand watches. This caliber is part of the Miyota 8000 Series family of movements, specifically in the “Small Hands” category. It features a sweeping small seconds hand at 4:30, as well as a date at 3:00.

Some of the topics covered in this caliber listing:

Miyota 8218 vs 8245:

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.

Accuracy Rating:

Miyota states that the caliber 8218 keep accuracy within -20～+40 seconds/day, with a posture difference of under 50 seconds/day.

Power Reserve:

The power reserve or running time when fully wound is about 42 hours. As for getting the full power reserve, Miyota says: The mainspring becomes fully wound by rotating the ratchet wheel 7.5 times or turning the crown 40 times.