The Seiko 1E20-5A90 is a watch model based on the 1E20 movement.
Parts List
| RE0A13SN02 | crystal - crystal |
| 25N05DE5 | crown - crown |
| 0H1400B01 | case back gasket - case back gasket |
| 1CE032LABDG | others - hour hand |
| 1E205A9043A | others - case |
| 82842990 | others - case ring |
| 1E200E90XA19 | others - dial |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1E20
