Seiko 7A38 Movement Details
Seiko caliber 7A38 is an analog quartz watch movement. Production was in the 1980s.
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| Sub-brands: | Sports 100, SQ, Speedmaster |
| Battery: | SR936SW / 394 (Silver oxide) |
| Accuracy: | ±15 seconds/month |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | Yes |
| Alarm? | No |
| Rate: | 32,768 Hz |
| Number of jewels: | 15 |
| Size / diameter: | 29.0mm |
| Height: | 4.6mm |
| Stem code: | 354728 |
| Date wheel code: | 801593 |
| Screw codes: | 022235 (dial screw), 022286, 022341, 022424, 022745 |
| Development division: | Suwa (Nagano) |
| Notes: | Used in a Ferrari-branded watch, renamed as "cal. 531". Has a battery life indicator. The same as cal. 7A28 but with day and date display. |
| PDF guides: | Technical guide : 7A38A |
| Related movements: | 7A28 7A34 7A36 7A48 7A54 |