The Seiko 7820-5240 is a watch model based on the 7820 movement.
Parts List
| SA1N82GN00 | crystal |
| 35R06NS1 | crown - crown |
| 35R30NA1 | crown |
| 35R30NS1 | crown |
| 0H2600B01 | case back gasket - case back gasket |
| LK521 | band - leather band |
| 09C44DSH | hand - hour hand |
| 10C20DSM | hand - minute hand |
| 0354780 | others - setting/winding stem |
| 0884736 | others - holding ring for dial |
| 7820524011 | others - case |
| 7820534084G3 | others - dial |
| 83107230 | others - case ring |
| A190CS | others - push pin |