The Seiko 1F21-5C30 is a watch model based on the 1F21 movement.
Parts List
| K00A44SR02 | crystal - crystal |
| 30MH2NB1 | crown |
| 30MH2NS1 | crown - crown |
| 0F140NA1S | case back gasket - case back gasket |
| D0H6AZ | band - band |
| D0H6FZ | band - band |
| 1BF037AMBNG | others - hour hand |
| 1BF037AMBNS | others - hour hand |
| 2BF055AMBNG | others - minute hand |
| 2BF055AMBNS | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1F215C3075 | others - case |
| 82836720 | others - case ring |
| 1F215C30 | others - case back |
| 1F215C3079 | others - case |
| 1F211F90XL13 | others - dial |
| 1F211G00XS14 | others - dial |
| 1F215 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |