The Seiko 1E20-0520 is a watch model based on the 1E20 movement.
Parts List
| 100N04GN00 | crystal |
| 30M98NA1 | crown |
| 0H1000N01 | case back gasket - case back gasket |
| DT17A | band - metal band |
| DT18A | band - metal band |
| 04V18DGH | others - hour hand |
| 04V18DGM | others - minute hand |
| 0351931 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82722960 | others - case ring |
| 1E200520 | others - case back |
| 1E2005202E | others - case |
| 1E2005202N | others - case |
| 1E201800XG14 | others - dial |
| 1E201800XS14 | others - dial |
| 1E208 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
