The Seiko 1F21-0K20 is a watch model based on the 1F21 movement.
Parts List
| 190A06SR02 | crystal - crystal |
| 30MA2NA1 | crown - crown |
| 30MA2NB1 | crown - crown |
| 30MA2NS1 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| DAV8DW | band - leather band |
| DAW0AW | band - leather band |
| D095AZ | band - metal band |
| D095CZ | band - metal band |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 0351807 | others - winding stem |
| 1BA050A1BAA | others - hour hand |
| 82822840 | others - case ring |
| 1F210K20 | others - case back |
| 1F210K2075 | others - case |
| 1F210K207E | others - case |
| 1F210K207N | others - case |
| 1F211E70XS14 | others - dial |
| 1F211E80XS19 | others - dial |
| 1F211F00XS19 | others - dial |
| 1F215 | others - machine code |
| A120AS | others - push pin |
| 1BB050A1BNG | others - hour hand |
| EZ0035B01 | others - crown and stem gasket |
| 1BC052A0BAC | others - hour hand |
| 1BC052A0BNG | others - hour hand |
| 2BA075A1BAA | others - minute hand |
| 2BB075A1BNG | others - minute hand |
| 2BC075A0BAC | others - minute hand |
| 2BC075A0BNG | others - minute hand |
| 190A06SR02 | crystal - crystal |
| 30MA2NA1 | crown - crown |
| 30MA2NB1 | crown - crown |
| 30MA2NS1 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| DAV8DW | band - leather band |
| DAW0AW | band - leather band |
| D095AZ | band - metal band |
| D095CZ | band - metal band |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 0351807 | others - winding stem |
| 1BA050A1BAA | others - hour hand |
| 82822840 | others - case ring |
| 1F210K20 | others - case back |
| 1F210K2075 | others - case |
| 1F210K207E | others - case |
| 1F210K207N | others - case |
| 1F211E70XS14 | others - dial |
| 1F211E80XS19 | others - dial |
| 1F211F00XS19 | others - dial |
| 1F215 | others - machine code |
| A120AS | others - push pin |
| 1BB050A1BNG | others - hour hand |
| EZ0035B01 | others - crown and stem gasket |
| 1BC052A0BAC | others - hour hand |
| 1BC052A0BNG | others - hour hand |
| 2BA075A1BAA | others - minute hand |
| 2BB075A1BNG | others - minute hand |
| 2BC075A0BAC | others - minute hand |
| 2BC075A0BNG | others - minute hand |