The Seiko 7820-5450 is a watch model based on the 7820 movement.
Parts List
| SA2N56GN00 | crystal |
| 35R30NA1 | crown |
| 35R30NS1 | crown |
| 0Z3000N01 | case back gasket |
| LV082 | band - leather band |
| 11C22DGM | hand - minute hand |
| 11C22DGH | others - hour hand |
| 0354780 | others - setting/winding stem |
| 0884559 | others - holding ring for dial |
| 782054504F | others - case |
| 782056108JU4 | others - dial |
| 83107230 | others - case ring |
| A180CS | others - push pin |