The Seiko 5Y30-7B20 is a watch model based on the 5Y30 movement.
Parts List
| 280W39JM01 | crystal |
| 280W39JM | crystal |
| 30ME9NN1 | crown |
| 0F230BAA | case back gasket |
| 0F230BAA3 | case back gasket - case back gasket |
| BPA74E | band |
| BPJ79G | band |
| 0351671 | others - winding stem |
| 11T39DGH | others - hour hand |
| 0D005BA13 | others - crown and stem gasket |
| 11T39DGM | others - minute hand |