The Seiko 2C20-5790 is a watch model based on the 2C20 movement.
Parts List
| ESTN27AN00 | crystal |
| 32N09NA1 | crown |
| 0H1450B01 | case back gasket - case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| D5020G | band - metal band |
| D5020G-BK3G | clasp - clasp |
| 05R05DGM | hand - minute hand |
| 06R05DGH | hand - hour hand |
| 06R33DGM | hand - minute hand |
| 2C2010 | others - machine code |
| 2C201600XG14 | others - dial |
| 2C201600XS14 | others - dial |
| 2C201610XN14 | others - dial |
| 2C20579025 | others - case |
| 82714450 | others - case ring |
| T080AS | others - push pin |
| 06R39NGM | others - minute hand |
| 06R11DGH | others - hour hand |
| 1DE040LABNG | others - hour hand |
Caliber 2C20
