The Seiko 2E20-5900 is a watch model based on the 2E20 movement.
Parts List
| ET3N15JN01 | crystal |
| 32N23NA1 | crown |
| 0F130NA11 | case back gasket |
| WCA03G | band - leather band |
| WCJ04G | band - leather band |
| WCJ05G | band - leather band |
| WCJ06G | band - leather band |
| WCZ01G | band - leather band |
| WCZ02G | band - leather band |
| 2EA037A3BDG | hand - minute hand |
| 82811570 | others - case ring |
| T070AS | others - push pin |
| DA007BA11 | others - crown and stem gasket |
| 2E201120XG14 | others - dial |
| 2E201130XB14 | others - dial |
| 2E201130XS14 | others - dial |
| 2E205900 | others - case back |
| 2E20590025 | others - case |
| 04L15DGH | others - hour hand |
| 04V23DGM | others - minute hand |
| 2EA035A3BDG | others - minute hand |
| 1CE025LABDG | others - hour hand |
| 2EE037LCBDG | others - minute hand |
| 1CA022A3BNG | others - hour hand |
| 04V03DGM | others - minute hand |
Caliber 2E20
