The Seiko A904-400A is a watch model based on the A904 movement.
Parts List
| SAAW10LM | crystal |
| SAAW10LM02 | crystal |
| FH2882B0A | case back gasket - case back gasket |
| FH2882B0 | case back gasket |
| EC0060B0 | case back gasket - crown gasket |
| 86580980 | crystal gasket - plastic gasket for crystal |
| 80613389 | pusher - button |
| ZLM08 | band - resin band |
| 89904720 | others - spacer |
| A220CS | others - push pin |
| A9041 | others - machine code |
| A904400A | others - case back |
| A904400A61 | others - case |
| EC0060B0A | others - button gasket |
| 81400709 | others - button spring clip |
| 81350460 | others - button spring |