The Seiko 1E20-5810 is a watch model based on the 1E20 movement.
Parts List
| SAEN44SN01 | crystal |
| SAEN44SN | crystal |
| 30MD2NA1 | crown |
| 0H1300N01 | case back gasket |
| 0H1300N0 | case back gasket |
| 0351931 | others - winding stem |
| 1E201440XG14 | others - dial |
| 1E20581041 | others - case |
| 1E20581043 | others - case |
| 1E208 | others - machine code |
| 82803680 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
| 05V08DGM | others - minute hand |
| 05V08NGH | others - hour hand |
Caliber 1E20
