The Seiko 1E20-2040 is a watch model based on the 1E20 movement.
Parts List
| 100A01SN02 | crystal - crystal |
| 25M69NS1 | crown - crown |
| 25M69NA1 | crown |
| 0D100BA11 | case back gasket - case back gasket |
| XX000 | band - band |
| DZ0040B01 | others - crown and stem gasket |
| 1E20204026 | others - case |
| 82811270 | others - case ring |
| 1E202040 | others - case back |
| 1E2020402E | others - case |
| 1E203 | others - machine code |
| 1E205090XA13 | others - dial |
| 1E205090XA14 | others - dial |
| 1CA025A3BNG | others - hour hand |
| 1CA025A3BNS | others - hour hand |
| 2EA035A3BDS | others - minute hand |
| 2EA035A3BDG | others - minute hand |
| 0354930 | others - winding stem |
Caliber 1E20
