The Seiko 7A28-703B is a watch model based on the 7A28 movement.
Parts List
| 315W18GN00 | crystal |
| 45M54NA1 | crown - crown |
| FH3181B01 | case back gasket - case back gasket |
| 80600529 | pusher |
| EG0060B01 | others - button gasket |
Caliber 7A28
Seiko 7A28-703B Watch Guide