The Seiko 7820-5390 is a watch model based on the 7820 movement.
Parts List
| SA2N28GM01 | crystal |
| SA2N28GM02 | crystal |
| 35R08NA1 | crown |
| 35R08NS1 | crown - crown |
| 35R30NS1 | crown |
| 35R30NA1 | crown |
| 0H2600B09 | case back gasket |
| 86179020 | crystal gasket - plastic gasket for crystal |
| AV352 | band - leather band |
| AV361 | band - leather band |
| AV362 | band - leather band |
| 11C36CGH | hand - hour hand |
| 11C36CGM | hand - minute hand |
| 11C36DBH | hand - hour hand |
| 11C36DBM | hand - minute hand |
| 11C36DGH | hand - hour hand |
| 11C36DGM | hand - minute hand |
| 7820539011A | others - case |
| 7820539025A | others - case |
| 7820539025B | others - case |
| 782055909999 | others - dial |
| 782056009989 | others - dial |
| 782056009999 | others - dial |
| 83107230 | others - case ring |
| 0354780 | others - setting/winding stem |
| 0884526 | others - holding ring for dial |
| A180CS | others - push pin |