Miyota Caliber 8217

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.

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.

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:

• AVI-8 Hawker Hunter
• Techné GosHawk
• Molarity Deep Diver

Additional Resources:

• Miyota caliber 8217 tech drawings (pdf)