| Manufacturer | Seiko Time Corp. |
| Caliber Number | 8J42 |
| Type | Quartz |
| Jewels | 5 / 7 |
| Vibrations Per Hour | 32,768Hz |
| Accuracy | +/- 10 secs/year |
| Battery Cell | SR916SW (373) |
| Functions | Central hours, central minutes, central seconds, date at 3:00 |
| Country of Manufacture | Japan |
| Known Models | Seiko Dolce (Add your watch to the comments below…) |
The Seiko caliber 8J42 is a 3-hand thermo-compensated high-accuracy quartz (HAQ) movement made in Japan.
Some of the topics covered in this caliber listing:
8J42 VS 8J41
There is a similar caliber 8J41. The main difference between these two movements is that the 8J42 has a date at 3:00 and the 8J41 does not have a calendar complication.
8J42 Battery Life
The Seiko caliber 8J42 is said to run up to 3 years on a fresh battery.
8J42 Accuracy
Seiko officially claims that the accuracy of the caliber 8J42 averages at +/- 10 seconds per year.
Instruction Manual
Additional Resources:
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Atlantic
Thank you for the pics. Model added to the list.