The Seiko 2E20-6389 is a watch model based on the 2E20 movement.
Parts List
| ET7N09JN01 | crystal |
| ET7N09JN | crystal |
| 32N23NN1 | crown |
| 32N23NA1 | crown |
| 0G1500B01 | case back gasket - case back gasket |
| 0G1500B0 | case back gasket |
| Z5324C | band |
| Z5324G | band |
| 03L07DGH | others - hour hand |
| DA007BA11 | others - crown and stem gasket |
| 0351205 | others - winding stem |
| 03V03DGM | others - minute hand |
Caliber 2E20
