The Seiko 5E21-6A20 is a watch model based on the 5E21 movement.
Parts List
| 270WA2SV01 | crystal |
| 30M58NA1 | crown - crown |
| 0H2520B01 | case back gasket |
| 0A2700N01 | case back gasket - case back gasket |
| 10ST08DG | others - second hand |
| 0351624 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82813340 | others - case ring |
| 5E211 | others - machine code |
| 5E216A20 | others - case back |
| 5E216A2098 | others - case |
| 5E216A20XB14 | others - dial |
| 09T18NAM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
| 09T04NGH | others - hour hand |