Seiko H557 Movement Details

Seiko caliber H557 is an analog + digital ("ana-digi") watch movement. Production was in the 1980s.
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Sub-brands: Silverwave, Sports 100
Battery:SR920W / 370 (Silver oxide)
Accuracy:±10 seconds/month
Day / date?Day + date
GMT / world time?Yes
Chronograph?Yes
Alarm?Yes
Rate:32,768 Hz
Number of jewels:3
Size / diameter:23.6mm x 26.0mm
Height:2.9mm
Notes:Has an alarm and battery life indicator. The same as cal. H556 but with different shaped LCD display.
PDF guides: Technical guide : H556A & H557A
Related movements: H556 H558