The Seiko 5Y30-5B90 is a watch model based on the 5Y30 movement.
Parts List
| BA3N23JV01 | crystal |
| BA3N23JV | crystal |
| 30N73NN1 | crown |
| 0H2650B01 | case back gasket |
| 0H2650B0 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| DZ0065B0 | case back gasket |
| ZRJ04G | band - leather band |
| 1BE055LABDG | others - hour hand |
| 5Y305B9025 | others - case |
| 5Y305E30XG15 | others - dial |
| 82803610 | others - case ring |
| A200BS | others - push pin |
| 08T01DGH | others - hour hand |
| 08T05DGM | others - minute hand |