Miyota Caliber 8218

Miyota Caliber 8218

Miyota Caliber 8218

BrandMiyota (Citizen)
Caliber Number8218
Movement TypeAutomatic
Diameter11 1/2”’ (26mm overall)
Height5.67mm
Jewels21
Vibrations Per Hour
21,600 bph
Shock SystemParashock
Power Reserve
~42 hours
Lift Angle49 degrees
Stem065-212
Hand Size
1.52mm / 1.0mm / 0.17mm
Winding Direction
Counterclockwise (uni-directional)
HackingNo
Hand-Windable?Yes
FunctionsHours, minutes, small seconds (at 4:00), date calendar
Country of ManufactureJapan
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

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Francis
Francis
4 years ago

Is this movement hackable?

Robert
Robert
4 years ago

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

Vasu
Vasu
1 year ago
Reply to  Robert

No

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JUAN CARLOS
JUAN CARLOS
3 years ago

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

Duncan Chapple
Duncan Chapple
4 months ago
Reply to  JUAN CARLOS

The Jaco JU-52 does not use this movement. It uses the Laco 18. which is based on a different Miyota movement.

Claudiu
Claudiu
2 years ago

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.

Aharon
Aharon
2 years ago
Reply to  Caliber Corner

Wow. Thanks for bringing that to my attention. It does look amazing.
Though I can’t help but wonder what it would be like to live with that small 24 hour dial. How easily can you tell the difference between 20:30 & 21:30?

Pete
Pete
2 years ago

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… Read more »

Pete
Pete
2 years ago
Reply to  Caliber Corner

I checked here to make sure it was actually hand winding and I wasn’t just mistaken. I’d be happy to snap a pic tomorrow. I have a couple others that I’ll add too. I only discovered this site a few days ago but I’ve probably checked it 5 times a day since just looking up different movements and such. Still can’t believe I didn’t know this was handwinding. Got it off Amazon, and they dont… Read more »

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Michael C Campbell
Michael C Campbell
1 year ago

Just got a Spinnaker Croft with the 8218.

Keepthetime
KeepTheTime.com
1 year ago

Awesome, congrats on the new watch!

Hadi
Hadi
9 months ago

I just got the black croft as well

PaulS
PaulS
1 year ago

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

AvengerBeast
AvengerBeast
7 months ago

I believe this is the movement in my Ingersoll 100506. No problems with it and it keeps good time. 🙂

Owen Yuen
Owen Yuen
6 months ago

Did Miyota discontinue this movement? It is not in their current catalog?

Frederik drost
Frederik drost
6 months ago

Just reviewed a watch from Fine Watches Berlin with that movement!

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