Seiko Caliber 6A32

Manufacturer	Seiko Time Corp.
Caliber Number	6A32, 6A32A
Movement Type	Quartz, battery-powered, perpetual calendar
Diameter	27.8mm
Casing Diameter	27.3mm
Height	3.69mm
Jewel Count	No jewels (0)
Frequency	32,768 Hz
Accuracy Rating	Less than +/- 20 seconds/month
Battery Cell #	SR927SW (silver oxide, 1.55 V)
Battery Life	~4 years
Driving System	Step motor for time, electronic driving motor for the perpetual calendar
Hand Count	3
Functions	Central hours; central minutes; central seconds; date at 3:00
Hacking Seconds?	Yes
Other Features	Electronic circuit reset switch aka AC reset, low battery indicator (EOL)
Country of Manufacture	Made in Japan
Known Models	Seiko Premier Perpetual Quartz SNQ155 (Add your watch to the comments below…)

The Seiko caliber 6A32 (6A32A) is a 3-hander quartz movement with a perpetual calendar date system.

Perpetual Calendar:

The 6A32 is equipped with a fully automatic perpetual calendar system which means that you do not have to correct the date on months that have 28. 29 or 30 days (leap years, for example).

In Seiko’s own words:

“Once set, the calendar automatically adjusts for odd and even months including February of leap years up to February 28, 2100.” -6A32 User Manual, page 4

Keep in mind that after a battery change, the date may need reset if the watch was stopped for a long period of time.

Important Notes:

• Do not check or make adjustments to the date when the hands are between the hours of 11:00 PM and 1:00 AM.
• Do not pull the crown out to time-setting mode (pulled out two clicks) while the date is changing.

Unlike other watches where hacking the movement can reduce energy consumption and save the battery, when the crown is pulled out on the 6A32, it will actually use more power and shorten the battery life.

Video – Setting the time/date:

Video – Changing the battery and AC reset:

6A32 Tech Sheets (pdf):

Additional Resources:

• Official 6A32A instruction manual (pdf)