Seiko 7903 Movement Details
Seiko caliber 7903 is an analog quartz watch movement. Production was in the 1970s.
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| Sub-brands: | Joyful |
| Battery: | SR41SW / 384 (Silver oxide) |
| Accuracy: | ±20 seconds/month |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| Number of jewels: | 7 |
| Size / diameter: | 18.0mm |
| Height: | 4mm |
| Development division: | Suwa (Nagano Prefecture, Japan) |
| Notes: | Has a battery life indicator function where the seconds hand moves in two-second intervals when the battery is running low. |
| PDF guides: | Technical guide : 7903A |
| Related movements: | 7918 |
Part Codes
| Stem code: | 354791 |
| Date wheel code: | 801584 |
| Screw codes: | 022282, 022424, 022468, 022764 (dial screw) |