The Seiko D409-5020 is a watch model based on the D409 movement.
Parts List
| ES4W97LN00 | crystal - crystal (inorganic) |
| 86562210 | case back gasket - plastic gasket for case back |
| 86562190 | crystal gasket - plastic gasket for crystal |
| 80606719 | pusher - button |
| 80606739 | pusher - button |
| GA53A | band - band |
| D409502079B | others - case |
| 86510031 | others - conducting plate |
| A200BS | others - push pin |
| D40910 | others - machine code |
| D409502A9989 | others - panel cover |
| EG0060B01 | others - button gasket |
| 83200241 | others - button spring clip |
Other models with the same movement