| Manufacturer | Seiko |
| Caliber Number | 8229, 8229A |
| Movement Type | Quartz, battery powered |
| Outer Diameter | 26mm |
| Casing Diameter | 24mm |
| Height | 3.8mm (not including the battery) |
| Jewels | 4 |
| Frequency | 32,768Hz |
| Battery Cell | SR9365SW (394) |
| Expected Battery Life | 5 Years |
| Driving System | 2 Pole step motor |
| Regulator | Trimmer condenser style |
| Hand Count | 3 |
| Functions | Central hours; central minutes; central seconds; day/date at 3:00 |
| Hacking Seconds? | Yes |
| Country of Manufacture | Japan |
| Known Models | Seiko Silver Wave, Seiko SQ Quartz, Seiko SQ Sports 100 (Add your watch to the comments below…) |
The Seiko caliber 8229 (aka 8229A) is a quartz movement with a quickset date and bilingual day of the week. This movement is found in vintage Seiko timepieces (circa 1980 onward) and is no longer being produced.
Accuracy:
Official Seiko documentation states that the cal. 8229 has an accuracy rating of less than 15 seconds deviation per month in normal operating conditions and temperatures. Over the span of a year, the 8229 is capable of keeping time within less than 3 minutes.
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