Miyota Caliber 8217 21 Jewels

Miyota Caliber 8217

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Brand	Miyota (Citizen)
Caliber Number	8217
Base Caliber	Miyota 8215
Movement Type	Automatic
Lignes	11 1/2”’
Diameter	26mm
Height	5.67mm
Jewels	21
Vibrations Per Hour	21,600 bph
Anti-Shock System	Parashock
Power Reserve	40+ hours
Winding Direction	Uni-directional (left)
Hacking	No
Lift Angle	49 degrees
Stem	065-212
Hand Size	1.52mm / 1.0mm / 0.17mm
Functions	Central hours; central minutes; central sweeping seconds; date at 3:00; 24 hr subdial at 9:00
Country of Manufacture	Japan
Known Models	Too many to list… (add yours in the comments below)

The Miyota caliber 8217 is from the affordable 8 Series family of what Miyota refers to as “Standard Automatics”. Caliber 8217 is based off of 8215/821A framework with the addition of a 24 hour hand at 9:00.

Some of the topics covered in this caliber listing:

What differentiates this caliber?

Aside from the hours/minutes/central seconds and date, this movement has a 24 hour subdial at 9:00.

Accuracy:

Miyota claims that the caliber 8217 offers accuracy of -20 ~ +40 seconds per day.

Citizen/Miyota:

Another movement that is similar is the Citizen caliber 4166.

Miyota Caliber 8217 Crown And Stem

Miyota 8217

Miyota Caliber 8217 Gears

Miyota Caliber 8217 In Szanto Big Aviator

Here is the 26mm Miyota 8217 movement in a 46mm Szanto Big Aviator watch:

The photo below is of a Miyota caliber 8217 found in this AVI-8 Hawker Hunter watch here.

Rotor Action

https://www.instagram.com/p/Bph915FHz_r

More watches with the Miyota 8217:

Additional Resources:

Miyota caliber 8217 tech drawings (pdf)

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