The Seiko 2E20-5990 is a watch model based on the 2E20 movement.
Parts List
| K06N03JN01 | crystal |
| K06N03JN | crystal |
| 30NA9NA1 | crown |
| DA007BA1 | case back gasket |
| 0F130NA1 | case back gasket |
| 0F130NA11 | case back gasket |
| Z5258G | band - metal band |
| Z5258G-LKG | band - link |
| Z5258G-PB1 | clasp - parts for buckle/clasp |
| Z5258G-BK4G | clasp - clasp |
| 04L13DGH | others - hour hand |
| 04V19DGM | others - minute hand |
| 2EE040LCBDG | others - minute hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 81609439 | others - bracelet fixing pin |
| 2E201230XB14 | others - dial |
| 2E201230XG14 | others - dial |
| 2E205990 | others - case back |
| 2E20599025 | others - case |
| 82821030 | others - case ring |
| DA007BA11 | others - crown and stem gasket |
| 1CE027L0BDG | others - hour hand |
| Z5258G-ES | others - eyelet screw |
| 04V19JGM | others - minute hand |
| 04L13JGH | others - hour hand |
Caliber 2E20
