Seiko 400 Movement Details

Seiko caliber 400 is an automatic watch movement. Production started around 1963.
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Sub-brands: Weekdater, Seikomatic
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?No
Rate:18,000 bph
Number of jewels:33
Size / diameter:27.6mm
Height:5.6mm
Stem code: 354720
Development division:Suwa (Nagano)
Related movements: 6206