The Seiko 7820-5220 is a watch model based on the 7820 movement.
Parts List
| SA1N78GN00 | crystal |
| 35R08NA1 | crown |
| 35R30NS1 | crown |
| 35R30NA1 | crown |
| 0H2600B01 | case back gasket - case back gasket |
| NK722 | band - leather band |
| 12C02CGH | hand - hour hand |
| 12C02CGM | hand - minute hand |
| 7820522025 | others - case |
| 7820533002G9 | others - dial |
| 83107230 | others - case ring |
| A200CS | others - push pin |
| 0354780 | others - setting/winding stem |
| 0884732 | others - holding ring for dial |