Miyota Caliber 8218

Miyota Caliber 8218

Miyota Caliber 8218

Brand Miyota (Citizen)
Caliber Number 8218
Movement Type Automatic
Diameter 11 1/2”’ (26mm overall)
Height 5.67mm
Jewels 21
Vibrations Per Hour
21,600 bph
Shock System Parashock
Power Reserve
~42 hours
Lift Angle 49 degrees
Stem 065-212
Hand Size
1.52mm / 1.0mm / 0.17mm
Winding Direction
Counterclockwise (uni-directional)
Hacking No
Hand-Windable? Yes
Functions Hours, minutes, small seconds (at 4:00), date calendar
Country of Manufacture Japan
Known Brands
Reverie Sea-Spirit, SD-09 UFO Spacecraft (add yours in the comments below)

The Miyota caliber 8218 is an automatic movement found in many microbrand watches.

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

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.

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.

Miyota Caliber 8218 Sd09

Tech Info

Is the Miyota Caliber 8218 any good? Share your opinions, experiences and watches below... Remember to keep comments respectful and follow our community guidelines.

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Francis
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Francis

Is this movement hackable?

Robert
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Robert

I have a Seiko SNK809 and wonder if this is the movement inside.

Vasu
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Vasu

No

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JUAN CARLOS
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JUAN CARLOS

The LACO JU-52, also has this caliber. What I do not know is if the caliber is refined o adjusted by Lack

Claudiu
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Claudiu

There are several watches which use the Miyota 8219 and remove the main hour hand, making it a 24-hour regulator watch. Some of these are: Sevenfriday Q2/01, CRJ Airspeed, Dufa Aalto, Apollo watches and at least 2 Parnis models.

Pete
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Pete

The Air Blue Papa Praesto uses this movement. Kind of ridiculous; I was just talking to my wife about movements and how they work and she wanted to see one. So I showed her the Papa Praesto’s since I’m wearing it. Anyways, as I’m showing her how an automatic works as opposed to handwinding, I found that this has handwinding, which I did not know after probably a year of owning it. I don’t recall it being advertised as having it or anything. Anyways stupid story, but, as I told her, I like this watch a little bit more knowing… Read more »

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Michael C Campbell
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Michael C Campbell

Just got a Spinnaker Croft with the 8218.

KeepTheTime.com
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Awesome, congrats on the new watch!

PaulS
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PaulS

Also found in French microbrand Axiom, several models f.i. «26» Bleu Horizon.
https://www.axiomwatches.fr/collection/26-bleu-horizon/