The Seiko 2C20-6490 is a watch model based on the 2C20 movement.
Parts List
| ESYN15AN01 | crystal |
| 30N77NA1 | crown |
| 0F150NA11 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| BGA19G | band - leather band |
| BGJ07G | band - leather band |
| BGS04G | band - leather band |
| BGZ17G | band - leather band |
| 07R03CGM | others - minute hand |
| 2C2010 | others - machine code |
| 2C203070XG14 | others - dial |
| 2C203070XL14 | others - dial |
| 2C203070XR14 | others - dial |
| 2C203080XS19 | others - dial |
| 2C20649025 | others - case |
| 82730110 | others - case ring |
| A110AS | others - push pin |
| 1CA045A1BNG | others - hour hand |
| 07R03DGM | others - minute hand |
| 2CA065A1BDG | others - minute hand |
| 1CA047A1BAA | others - hour hand |
| 2CA070A1BDG | others - minute hand |
| 1CA045A1BAA | others - hour hand |
Caliber 2C20
