The Seiko 1E20-0790 is a watch model based on the 1E20 movement.
Parts List
| 100N04GN00 | crystal |
| 100N04GN | crystal |
| 30M98NA1 | crown |
| 0H1000B01 | case back gasket |
| 0H1000B0 | case back gasket |
| B5680G | band |
| B5680G-LKG | band - link |
| B5680G-BK4G | clasp - clasp |
| 03V08DGH | others - hour hand |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82722960 | others - case ring |
| 1E200790 | others - case back |
| 1E20079025 | others - case |
| 1E202370XB14 | others - dial |
| 1E202370XG14 | others - dial |
| 1E202370XS14 | others - dial |
| 1E208 | others - machine code |
| 03V08DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
