Citizen Caliber 8229A

Brand	Citizen
Caliber Number	8229, 8229A
Manufacturer	Miyota
In-House?	Yes (Citizen owns Miyota)
Movement Type	Automatic, self-winding mechanical
Lignes	11.5”’
Diameter	26mm
Height	5.67mm
Jewels	21
Vibrations Per Hour	21,600 bph
Lift Angle	49 degrees
Accuracy Rating	-20 ~ +40 sec/day
Power Reserve	42+ hours
Rotor Winding Direction	Uni-directional (left)
Hand-Windable?	Yes
Manual Winding Direction	Clockwise
Anti-Shock System	Parashock
Hand Count	3
Hand Sizes	1.52mm / 1.0mm / 0.17mm
Functions	Central hours; central minutes; central sweeping seconds; skeletonized open balance wheel at 7:00
Hacking Seconds?	Yes and No (see below)
Country of Manufacture	Japan
Known Models	(Add yours in the comments below…)

The Citizen caliber 8229 (8229A) is from the 82XX family of automatic movements but offers a semi-skeletonized dial design with an open balance wheel at 7:00.

You may find models with the open balance wheel at 6:00, but this is achieved by rotating the movement counterclockwise so that the crown is positioned at 2:00.

The Miyota version of this movement for use in non-Citizen branded watches is Miyota caliber 8S20.

Accuracy:

Citizen claims that the caliber 8229 offers accuracy of -20 ~ +40 seconds per day. This is measured within 10-60 minutes from a full wind via the crown. To fully wind the movement, turn the crown 40 times. The winding direction of the rotor is counterclockwise.

Upgraded Hacking Seconds:

From the Miyota 8S20 caliber listing:

“As of mid-2019, Miyota seems to have listened to the desires of the watch community and found a way to integrate a hacking mechanism (stop seconds device) into the 82S0. This means that the seconds hand will stop when the crown is pulled out. We have reached out to Miyota and will update this listing as soon as we have a reply with more information as to when they made this change. Keep in mind that although there are 82S0 movements popping up on the market, the current majority of 82S0 powered watches will be non-hacking. If you watch doesn’t hack, it doesn’t mean it’s broken.” –Source

Dial Side View:

Additional Resources:

• Offical Citizen 8229 user manual (pdf)