The Seiko A904-506B is a watch model based on the A904 movement.
Parts List
| ES8W14HM03 | crystal |
| FH2882B0A | case back gasket - case back gasket |
| 86573480 | crystal gasket - plastic gasket for crystal |
| 80613349 | pusher - button |
| Z1242S | band - metal band |
| 81350460 | others - button spring |
| EC0060B0A | others - button gasket |
| 83200271 | others - button spring clip |
| A200CS | others - push pin |
| A9041 | others - machine code |
| A904503B9979 | others - panel cover |
| A904506B61 | others - case |