Seiko 7N42 Movement Details
Seiko caliber 7N42 is an analog quartz watch movement.
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| Sub-brands: | The Great Blue |
| Battery: | SR920SW / 371 (Silver oxide) |
| Accuracy: | ±15 seconds/month |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| Number of jewels: | 0 or 1 |
| Size / diameter: | 23.5mm x 21.9mm |
| Height: | 2.9mm |
| Notes: | The same as cal. 7N43 but without day display (date only). There are 7N42A and 7N42C variants of this movement – 7N42C is about 0.1 mm thinner and has one jewel, whereas 7N42A has no jewels. |
| PDF guides: |
Technical guide
: 7N22A, 7N29A, 7N33A, 7N42A & 7N43A
Technical guide : 7N42C, 7N43C |
| Related movements: | 7N22 7N29 7N33 7N43 7N47 7N48 |
Part Codes
| Stem code: | 351892 (tap 11) |
| Screw codes: | 022410 |