Seiko 7550 Movement Details
Seiko caliber 7550 is an analog quartz watch movement. Production was in the 1980s.
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|Battery:||SR43SW / 301 (Silver oxide)
|Day / date?||No|
|GMT / world time?||No|
|Number of jewels:||5|
|Size / diameter:||27.0mm|
|Development division:||Suwa (Nagano Prefecture, Japan)|
|Notes:||Used in "railway" pocket watches.|