Seiko Caliber H557 No technical information found for this movement.Watches with the H557 movementH557-5000H557-500AH557-5030H557-503AH557-5050H557-505AH557-5060H557-506AH557-506BH557-506CH557-5070H557-5080H557-5090H557-5099H557-509AH557-509HH557-5100H557-510AH557-5110H557-511AH557-5120H557-5130H557-513AH557-5140H557-514AH557-5150H557-5160H557-516AH557-5170H557-5179H557-517AH557-5180H557-5190H557-5200H557-520AH557-5210H557-521AH557-5240H557-524AH557-5250H557-525AH557-5260H557-5270H557-5290H557-529AH557-5300H557-5310H557-5319H557-531AH557-531HH557-5320H557-532AH557-5330H557-5340H557-534AH557-5350H557-535AH557-5360H557-5370H557-5380H557-5390H557-539A