The Seiko H557-5270 is a watch model based on the H557 movement.
Parts List
| SA4W86GN00 | crystal - crystal |
| 45E20NS1 | crown |
| 0C2980B0A | case back gasket - case back gasket |
| 86565700 | crystal gasket - plastic gasket for crystal |
| 80613149 | pusher - button |
| NA17A | band - band |
| 07T20BSH | others - hour hand |
| 07T20BSM | others - minute hand |
| EC0060B0A | others - button gasket |
| 83200271 | others - button spring clip |
| 81350460 | others - button spring |
| 0354655 | others - winding stem |
| H557527061 | others - case |
| 84300803 | others - dial ring |
| A180CS | others - push pin |
| H5571 | others - machine code |
| H557536LX997 | others - dial |
| 0A0150B0A | others - crown and stem gasket |
| 08SC16ES | others - second hand |
| 89995390 | others - pusher spacer |