The Seiko 1F21-1A10 is a watch model based on the 1F21 movement.
Parts List
| 190W24SN01 | crystal |
| 30MA2NA1 | crown - crown |
| 0A1800B01 | case back gasket |
| MK68D | band - band |
| 08SC14NG | others - second hand |
| 0351807 | others - winding stem |
| 82820520 | others - case ring |
| 1F211A1075 | others - case |
| 1F211A10 | others - case back |
| 1F211B10XS19 | others - dial |
| 1F219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 07TC2FGH | others - hour hand |
| 07TC2FGM | others - minute hand |