The Seiko 1F21-5C80 is a watch model based on the 1F21 movement.
Parts List
| K01A06SR02 | crystal - crystal |
| 35MV4NA1 | crown - crown |
| 35MV4NB1 | crown - crown |
| 35MV4NS1 | crown - crown |
| 0F140NA1S | case back gasket - case back gasket |
| 0F140BA1S | case back gasket - case back gasket |
| DE07BW | band - band |
| D0P0AZ | band - band |
| D0P0FZ | band - band |
| DE05AW | band - band |
| DE06AW | band - band |
| 1BC032A0BNG | others - hour hand |
| 1BC032A0BNS | others - hour hand (lower) |
| 1BH030A0BNG | others - hour hand |
| 2BC045A0BNG | others - minute hand |
| 2BC045A0BNS | others - minute hand |
| 2BH045A0BNG | others - minute hand |
| 3BA075F0BNG | others - second hand |
| 3BA075F0BNS | others - second hand |
| 0351807 | others - winding stem |
| 1F215C8079 | others - case |
| 1F215C807E | others - case |
| 82837380 | others - case ring |
| 1F215C8075 | others - case |
| 1F215C80 | others - case back |
| 1F215C8075A | others - case |
| 1F211G60XL14 | others - dial |
| 1F211G70XS14 | others - dial |
| 1F212A30XS14 | others - dial |
| 1F212A30XS23 | others - dial |
| 1F212A30XZ13 | others - dial |
| 1F215 | others - machine code |
| B090BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |