The Seiko 5Y30-5D50 is a watch model based on the 5Y30 movement.
Parts List
| SAEN57JN00 | crystal |
| SAEN57JN | crystal |
| 30N39NN1 | crown |
| 30N39NA1 | crown |
| 0H2800B01 | case back gasket - rotating bezel gasket |
| 0H2800B0 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| ZPJ40G | band |
| ZPA47G | band |
| 1BA060A1BNG | others - hour hand |
| 0351671 | others - winding stem |
| 09T13NGH | others - hour hand |
| 09T13NGM | others - minute hand |
| 09T21DGM | others - minute hand |
| 2BA090A1BNG | others - minute hand |
| 09T21DGH | others - hour hand |