The Seiko 1F21-0J1A is a watch model based on the 1F21 movement.
Parts List
| 210A08SV0A | crystal |
| 30MJ6NA4 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| HK15D | band - leather band |
| 0351807 | others - winding stem |
| 07SC06DG | others - second hand |
| 82822840 | others - case ring |
| 1F210J1A | others - case back |
| 1F210J1A75 | others - case |
| 1F211C70XS14 | others - dial |
| 1F215 | others - machine code |
| A120AS | others - push pin |
| 1BB050L0BCC | others - hour hand |
| EZ0035B01 | others - crown and stem gasket |
| 2BB075L0BCC | others - minute hand |