The Seiko 1E20-5440 is a watch model based on the 1E20 movement.
Parts List
| K02N18JN01 | crystal - crystal |
| 30M68NS1 | crown |
| 0H1400N01 | case back gasket - case back gasket |
| RZ04A | band - band |
| 04V36DSM | others - minute hand |
| 05V08NSH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1E2054402E | others - case |
| 82732600 | others - case ring |
| 1E200770XS13 | others - dial |
| 1E208 | others - machine code |
| 0351931 | others - winding stem |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
