The Seiko 5Y30-6A40 is a watch model based on the 5Y30 movement.
Parts List
| 255N13JK | crystal |
| 255N13JK01 | crystal |
| 32M25NN1 | crown |
| 0H2450B0 | case back gasket |
| 0H2450B01 | case back gasket |
| BPZ55G | band - leather band |
| 09T59NGH | hand - hour hand |
| 5Y306A4025 | others - case |
| 5Y306A60XS14 | others - dial |
| EB0055B01 | others - crown and stem gasket |
| 81606511 | others - bracelet fixing pin |
| 81181879 | others - bracelet fixing pipe |
| 81606219 | others - bracelet fixing pin |
| 82732470 | others - case ring |
| EB0055B0 | others - crown gasket |
| 09T59NGM | others - minute hand |
| 2BA095F5BNG | others - minute hand |