The Seiko 7820-5490 is a watch model based on the 7820 movement.
Parts List
| SA2N28GN00 | crystal - crystal |
| 35R08NA1 | crown |
| 35R08NS1 | crown - crown |
| 35R30NS1 | crown |
| 35R30NA1 | crown |
| 0A2600N01 | case back gasket - case back gasket |
| 86179020 | crystal gasket - plastic gasket for crystal |
| LV372 | band - leather band |
| LV381 | band - leather band |
| 11C16CGH | hand - hour hand |
| 11C16CGM | hand - minute hand |
| 11C16CKH | hand - hour hand |
| 11C16CKM | hand - minute hand |
| 11C16CSH | hand - hour hand |
| 11C16CSM | hand - minute hand |
| 7820549011 | others - case |
| 7820549025 | others - case |
| 782056708CG7 | others - dial |
| 782056708F08 | others - dial |
| 782056708XU3 | others - dial |
| 83107230 | others - case ring |
| A180CS | others - push pin |
| 0354780 | others - setting/winding stem |
| 0884526 | others - holding ring for dial |