The Seiko 1F21-0K80 is a watch model based on the 1F21 movement.
Parts List
| 180P02SN02 | crystal - crystal |
| 6K30A0TNA1 | crown - crown |
| 6K30A0TNG1 | crown - crown |
| 0F170BAAS | case back gasket - case back gasket |
| 0F170NAAS | case back gasket - case back gasket |
| 86577480 | crystal gasket |
| D0V2DG | band - band |
| D0V2EG | band - band |
| 3BA090F1BNG | others - second hand |
| EZ0035B0A | others - crown and stem gasket |
| 0351807 | others - winding stem |
| 82822980 | others - case ring |
| 1F210K80SW | others - case |
| 1F210K80 | others - case back |
| 1F210K80SWA | others - case |
| 1F211J00XS14 | others - dial |
| 1F211J10XS14 | others - dial |
| 1F215 | others - machine code |
| T070BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 1BB050A1BNG | others - hour hand |
| 2BB075A1BNG | others - minute hand |