The Seiko 1E20-5800 is a watch model based on the 1E20 movement.
Parts List
| ESHN06SN01 | crystal |
| ESHN06SN | crystal |
| 30MD2NA1 | crown |
| 0H1610N01 | case back gasket |
| 0H1610N0 | case back gasket |
| 1E201430XG14 | others - dial |
| 1E20580041 | others - case |
| 1E20580043 | others - case |
| 1E208 | others - machine code |
| 82803660 | others - case ring |
| 0351931 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 04V02DGM | others - minute hand |
| 1CE030L2BDG | others - hour hand |
| 04V02DGH | others - hour hand |
Caliber 1E20
