The Seiko 7820-5440 is a watch model based on the 7820 movement.
Parts List
| ES0N98SN00 | crystal |
| 35R30NA1 | crown |
| 35R30NS1 | crown |
| 0A2600N01 | case back gasket - case back gasket |
| LV091 | band - leather band |
| LV092 | band - leather band |
| 10C26CGM | hand - minute hand |
| 10C26CSM | hand - minute hand |
| 10C26DSM | hand - minute hand |
| 11C16CGH | hand - hour hand |
| 11C16CSH | hand - hour hand |
| 11C16DSH | hand - hour hand |
| 7820544011 | others - case |
| 7820544025 | others - case |
| 782055803GB8 | others - dial |
| 782055803S47 | others - dial |
| 782055808XX3 | others - dial |
| 83107230 | others - case ring |
| A180CS | others - push pin |
| 0354780 | others - setting/winding stem |
| 0884554 | others - holding ring for dial |