The Seiko 2E20-6400 is a watch model based on the 2E20 movement.
Parts List
| ET7N01JN01 | crystal |
| ET7N01JN | crystal |
| 32M41NN1 | crown |
| 0G1400B0 | case back gasket |
| 0G1400B01 | case back gasket |
| B5533G | band |
| 1CA027A3BNG | others - hour hand |
| DA007BA11 | others - crown and stem gasket |
| 0351205 | others - winding stem |
| 2EA040A3BNG | others - minute hand |
| 04V31NGM | others - minute hand |
| 04L07NGH | others - sub hand |
Caliber 2E20
