The Seiko H556-5050 is a watch model based on the H556 movement.
Parts List
| 340W20GN | crystal |
| 340W20GN00 | crystal |
| 40M76NS1 | crown |
| FH3380B01 | case back gasket - case back gasket |
| 86565560 | crystal gasket - plastic gasket for crystal |
| 80613789 | pusher |
| 80613809 | pusher |
| EG0060B01 | others - button gasket |