The Seiko 1E20-6400 is a watch model based on the 1E20 movement.
Parts List
| RE0A24SN01 | crystal - crystal |
| 27M02EEA | crown |
| 27M02EX3 | crown |
| 0E130NA1S | case back gasket |
| XX000 | band - band |
| 04V22DGH | others - hour hand |
| 04V22DGM | others - minute hand |
| 04V22DSH | others - hour hand |
| 04V22DSM | others - minute hand |
| 0351931 | others - winding stem |
| 1E2064001E | others - case |
| 82834020 | others - case ring |
| 1E20640043 | others - case |
| 81501405 | others - case back screw |
| 1E202400XG14 | others - dial |
| 1E202400XS13 | others - dial |
| 1E208 | others - machine code |
| 81501406 | others - screw |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
