Seiko Caliber 7L22

Manufacturer	Seiko Time Corp.
Caliber Number	7L22, 7L22A
Movement Type	Kinetic, rechargeable quartz
Diameter	32mm
Casing Diameter	30mm
Height	6.4mm
Jewel Count	8 jewels
Frequency	32,768 Hz
Accuracy Rating	< +/- 15 seconds/day
Capacitor Part #	3023.24T, 302324T (rechargeable lithium, MT920 series, previously 3023.44Z)
Power Reserve	~5 months on a full charge
Setting Stem	0351 892
Hand Count	5
Functions	Offset hours and minutes (subdial at 6:00); running small seconds at 10:00; central chronograph/stopwatch 1/5 seconds hand; 45 minutes retrograde minutes counter at 2:00; date at 6:00 or 4:30
Hacking Seconds?	Yes
Other Features	Quickset date, electronic circuit reset switch aka AC reset, low power indicator, overcharge prevention, “heart-cam” flyback chronograph seconds hand
Country of Manufacture	Made in Japan
Known Models	Seiko Sportura Kinetic, Seiko Actura Chronograph, Seiko Premier Kinetic Chronograph (Ref: SNL042P1) (Add your watch to the comments below…)

The Seiko caliber 7L22 (7L22A) is a kinetic watch movement with a chronograph function featuring retrograde minutes.

7L22 Tech Sheets (pdf):

Additional Resources:

• Official 7L22 instruction manual (pdf)
• More “kinetic” mentions