The Seiko 5Y30-5C40 is a watch model based on the 5Y30 movement.
Parts List
| ET6N33JN01 | crystal |
| ET6N33JN | crystal |
| 30N77NN1 | crown |
| DZ0065B01 | case back gasket - button gasket |
| DZ0065B0 | case back gasket |
| 0H2600B01 | case back gasket - case back gasket |
| 0H2600B0 | case back gasket |
| Z1479C | band - metal band |
| Z1479C-LKG | band - link |
| Z1479D | band - metal band |
| Z1479D-LKG | band - link |
| Z1479D-PB1 | clasp - parts for buckle/clasp |
| Z1479D-BK4G | clasp - clasp |
| Z1479C-PB1 | clasp - parts for buckle/clasp |
| Z1479C-BK4S | clasp - clasp |
| 2BA085A3BNG | hand - minute hand |
| 1BA060A1BNG | others - hour hand |
| 5Y305C4025 | others - case |
| 5Y305E90XN14 | others - dial |
| 5Y305F00XB14 | others - dial |
| 82830150 | others - case ring |
| 81182699 | others - bracelet fixing pipe |
| 81609699 | others - bracelet fixing pin |
| 08T27DGM | others - minute hand |
| 2BA085A3BDG | others - minute hand |
| 08T03DGM | others - minute hand |
| 08T27DGH | others - hour hand |