The Seiko 1E20-5A00 is a watch model based on the 1E20 movement.
Parts List
| SAFN71JK01 | crystal |
| 30N63NS1 | crown |
| 30ND3NS1 | crown |
| 0D125BA11 | case back gasket |
| 0D130BA11 | case back gasket |
| TZ10A | band - metal band |
| TZ11A | band - metal band |
| 1CG027LABDS | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 81609439 | others - bracelet fixing pin |
| 1E200A60XG14 | others - dial |
| 1E200A60XG23 | others - dial |
| 1E205A002E | others - case |
| 1E208 | others - machine code |
| 82800250 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 04L05DSH | others - hour hand |
| 04L05DGH | others - hour hand |
| 04V13DGM | others - minute hand |
| 0354930 | others - winding stem |
| 04V13DSM | others - minute hand |
| 1CG027LABDG | others - hour hand |
Caliber 1E20
