The Seiko 1E20-2020 is a watch model based on the 1E20 movement.
Parts List
| 110A05HNL4 | crystal |
| 110A05JN04 | crystal |
| 25M69NA1 | crown |
| 0D120BA11 | case back gasket - case back gasket |
| HZ09B | band - metal band |
| HZ10B | band - metal band |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 82813850 | others - case ring |
| 81606679 | others - bracelet fixing pin |
| 1E202020 | others - case back |
| 1E20202026 | others - case |
| 1E2020202N | others - case |
| 1E205040XS14 | others - dial |
| 1E208 | others - machine code |
| 04L25DGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
| 04V35DGM | others - minute hand |
| 1CH027SMBDG | others - hour hand |
Caliber 1E20
