The Seiko 1F21-0E20 is a watch model based on the 1F21 movement.
Parts List
| 190W24SN01 | crystal |
| 35MM0NA1 | crown |
| 0A1800B01 | case back gasket |
| DA48A | band - band |
| 1BB052A0BNG | others - hour hand |
| 2BB075A0BNG | others - minute hand |
| 3BA075F0BNG | others - second hand |
| 0351807 | others - winding stem |
| 1F210E207L | others - case |
| 82821060 | others - case ring |
| 1F210G20XS14 | others - dial |
| 1F215 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |