The Seiko 7820-5050 is a watch model based on the 7820 movement.
Parts List
| SA1N38GN00 | crystal |
| 35R08NA1 | crown |
| 35R08NS1 | crown - crown |
| 35R30NS1 | crown |
| 35R30NA1 | crown |
| 0H2800B09 | case back gasket |
| LV881 | band - leather band |
| LV882 | band - leather band |
| LV891 | band - leather band |
| LV902 | band - leather band |
| 11C16CGH | hand - hour hand |
| 11C16CGM | hand - minute hand |
| 11C16CSH | hand - hour hand |
| 11C16CSM | hand - minute hand |
| 11C16DGH | hand - hour hand |
| 11C16DGM | hand - minute hand |
| 11C16DSH | hand - hour hand |
| 11C16DSM | hand - minute hand |
| 7820505011 | others - case |
| 7820505025 | others - case |
| 782050700137 | others - dial |
| 7820507002G8 | others - dial |
| 782050701LC3 | others - dial |
| 782050703394 | others - dial |
| 83107230 | others - case ring |
| A180CS | others - push pin |
| 0354780 | others - setting/winding stem |
| 0884697 | others - holding ring for dial |