The Seiko 2E20-5840 is a watch model based on the 2E20 movement.
Parts List
| ET2N27HM01 | crystal |
| ET2N27HM02 | crystal |
| 30NA9NA1 | crown |
| 0F140NA11 | case back gasket |
| 0E140BA1 | case back gasket |
| B5421G | band - metal band |
| B5421S | band - metal band |
| B5421S-BK3S | clasp - clasp |
| B5421G-BK3G | clasp - clasp |
| 2EG040LABDG | others - minute hand |
| DA007BA11 | others - crown and stem gasket |
| 04L05DGH | others - hour hand |
| 2E201060XG19 | others - dial |
| 2E201060XN19 | others - dial |
| 2E205840 | others - case back |
| 2E20584025 | others - case |
| 2E2058402H | others - case |
| 82810430 | others - case ring |
| T070AS | others - push pin |
| 04V05DGM | others - minute hand |
| 1CG027LABDG | others - hour hand |
Caliber 2E20
