Seiko Caliber 6F22

Manufacturer	Seiko
Caliber Number	6F22, 6F22A
Movement Type	Quartz, battery-powered
Production Span	circa 1980s~1990
Diameter	19mm x 22mm
Casing Diameter	24mm
Height	3.3mm
Jewel Count	1
Frequency	32,768 Hz
Battery Cell	SR920SW (371)
Battery Life	~3 years
Regulator?	None
Driving System	Step motor
Hand Count	3
Functions	Central hours; central minutes; central seconds; moonphase indicator at 6:00; date at 12:00 or 3:00
Hacking Seconds?	Yes
Quickset Date?	Yes
Country of Manufacture	Made in Japan
Known Models	(Add your watch to the comments below…)

The Seiko caliber 6F22 (6F22A) is a vintage quartz moonphase movement with a date.

Seiko 6F22 VS 6F29:

There is a similar caliber 6F29 with the main difference being that the 6F22 is a 3-hander (hours/mins/secs) and the 6F29 is a 2-hander (hours/mins).

Additional Resources:

• List of Seiko watch movements