The Seiko 1E20-5280 is a watch model based on the 1E20 movement.
Parts List
| ESCN22GN00 | crystal |
| 30M54NA1 | crown |
| 30M54NS1 | crown - crown |
| 0H1100N01 | case back gasket |
| TT14A | band - metal band |
| TT26A | band - metal band |
| TT27A | band - metal band |
| 04V04NSH | others - hour hand |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1E200550XG14 | others - dial |
| 1E200550XS13 | others - dial |
| 1E20528025 | others - case |
| 1E2052802E | others - case |
| 1E208 | others - machine code |
| 82730300 | others - case ring |
| 0354930 | others - winding stem |
| 04V04DSM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 04V04DGM | others - minute hand |
| 04V04NGH | others - hour hand |
Caliber 1E20
