Seiko 8420 Movement Details
Seiko caliber 8420 is a high grade analog quartz watch movement. Production was in the 1980s.
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|Battery:||SR616SW / 321 (Silver oxide)
|Day / date?||No|
|GMT / world time?||No|
|Number of jewels:||6|
|Size / diameter:||14.9mm|
|Development division:||Daini (Kameido, Tokyo, Japan),Suwa (Nagano Prefecture, Japan)|