The Seiko 2C20-5820 is a watch model based on the 2C20 movement.
Parts List
| REAN71AN00 | crystal |
| 30N77NA1 | crown |
| 0G2125B01 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| BMA07G | band - leather band |
| BMJ09G | band - leather band |
| 07R09DGM | hand - minute hand |
| 07R29DGH | others - hour hand |
| 1DE042LABDG | others - hour hand |
| 2C2010 | others - machine code |
| 2C201670XG14 | others - dial |
| 2C201680XS19 | others - dial |
| 2C201690XN14 | others - dial |
| 2C20582025 | others - case |
| A160AS | others - push pin |
| 06R11DGM | others - minute hand |
| 1CA045A1BNG | others - hour hand |
| 2CA065A1BNG | others - minute hand |
| 1CA047A1BAA | others - hour hand |
| 1CA045A1BAA | others - hour hand |
Caliber 2C20
