The Seiko 1E20-5580 is a watch model based on the 1E20 movement.
Parts List
| RE9N08JN01 | crystal - crystal |
| 30M68NA1 | crown - crown |
| 0H1200N01 | case back gasket |
| RZ05A | band - band |
| RZ06A | band - band |
| 03V18NGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1E20558025 | others - case |
| 82723480 | others - case ring |
| 1E200990XG14 | others - dial |
| 1E200990XG24 | others - dial |
| 1E208 | others - machine code |
| 03V06DGM | others - minute hand |
| 0351931 | others - winding stem |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
