Manufacturer | Seiko Time Corp. |
Caliber Number | 6N22, 6N22A |
Movement Type | Quartz, battery-powered |
Diameter | 18.5mm (16.1mm x 18.2mm) |
Casing Diameter | 18.1mm |
Height | 2.79mm |
Jewel Count | No jewels (0) |
Frequency | 32,768 Hz |
Battery Cell | SR621SW / 364 (silver oxide, 1.55 V) |
Battery Life | ~3 years (36 months) |
Stem | 0351-332 |
Coil Part # | 4004274 |
Hand Count | 3 hands |
Functions | Central hours; central minutes; central seconds; date at 3:00 or 6:00 |
Hacking Seconds? | Yes |
Country of Manufacture | Made in Japan |
Known Models | (Add yours in the comments below…) |
The Seiko caliber 6N22 (6N22A) is a 3-hander analog quartz movement. It is made in Japan and has no jewels. Timepieces with this movement feature a calendar date at 6:00.
This appears to be the Seiko-only version of the SII/TMI calibre VJ22 (VJ22A).
Some of the topics covered in this caliber listing:
Accuracy Rating:
According to official Seiko documentation, they claim that the average monthly rate of the 6N22 is less than +/- 20 seconds per month under normal conditions (source).
With regards to the 6N22, “normal” temperatures should be within the range of 5°C ~ 35°C (41°F ~ 95°F) for the best accuracy, however, the movement can still operate between -10C ~ 60C (14F ~ 140F).
Changing the Battery:
The battery cell number in the calibre 6N22 is SR621SW / 364.
Datewheel Options:
The 6N22 has various datewheel options depending on color and position of the calendar window on the dial:
- Black text on white background at 3:00 (0878 152, 878152)
- White text on black background at 3:00 (0878 155, 878155)
- Black text on white background at 6:00 (0878 160, 878160)
- White text on black background at 6:00 (0878 161, 878161)
6N22 VS 6N42:
The cal. 6N42 (which was replaced by the 6N52) is essentially a larger diameter version of the 6N22.
6N22 | 6N42 | |
Outside Diameter | 18.5mm | 26.4mm |
Casing Diameter | 18.1mm | 25.6mm |
Height | 2.79mm | 2.79mm |
6N22 VS 6N23:
There is a similar caliber 6N23 with the main difference being that the 6N22 has a date and the 6N23 has a day of the week and date.
Additional Resources:
Recent Comments
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