Seiko 9642 Movement Details
                
                Seiko calibre 9642 is a high grade analogue quartz watch movement. Production started around 1980.
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| Sub-brands: | Seagull, King Quartz, Grand Quartz | 
| Battery: | SR920SW / 371 (Silver oxide) | 
| Accuracy: | ±20 seconds/year | 
| Day / date? | Date only | 
| GMT / world time? | No | 
| Chronograph? | No | 
| Hacking? | Yes | 
| Rate: | 32,768 Hz | 
| Number of jewels: | 6 | 
| Size / diameter: | 24.0mm | 
| Height: | 2.4mm | 
| Development division: | Daini (Kameido, Tokyo, Japan),Suwa (Nagano Prefecture, Japan) | 
| Notes: | Twin quartz for greater accuracy. The same as cal. 9641 but with date display. | 
| Related movements: | 9641 |