The Seiko 7820-8040 is a watch model based on the 7820 movement.
Parts List
| 290N06GN00 | crystal - mineral crystal |
| 35R30NA1 | crown |
| 35R30NS1 | crown |
| 0H2930B09 | case back gasket |
| BK322 | band - leather band |
| 12C18CGH | hand - hour hand |
| 12C18CGM | hand - minute hand |
| 12C18DGH | hand - hour hand |
| 12C18DGM | hand - minute hand |
| 782080308J69 | others - dial |
| 782080403GL4 | others - dial |
| 782080404F | others - case |
| 83107230 | others - case ring |
| A180CS | others - push pin |
| 0354780 | others - setting/winding stem |
| 0884594 | others - holding ring for dial |