The Seiko 1E20-2A90 is a watch model based on the 1E20 movement.
Parts List
| 120A08JR02 | crystal - crystal |
| 30ML2ES1 | crown - crown |
| 30ML2NA1 | crown |
| 0F110BA1S | case back gasket - case back gasket |
| 48B0JM-LK6 | band - link |
| 48B0KM-LK6 | band - link |
| 48B0KM | band - band |
| 48B0JM | band - band |
| 48B0JM-BKN | clasp - buckle |
| 48B0KM-BKN | clasp - buckle |
| 1CG027L0BDS | others - hour hand |
| 1CG027L0BDG | others - hour hand |
| 2CG042L0BDS | others - minute hand |
| 2CG042L0BDG | others - minute hand |
| 0351931 | others - winding stem |
| 1E205D38XB13 | others - dial |
| 1E205D38XG24 | others - dial |
| 1E207 | others - machine code |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82821920 | others - case ring |
| 1E202A9075Z | others - case |
| 1E202A90 | others - case back |
| 1E202A9079Z | others - case |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1E20
