The Seiko 1F21-5A30 is a watch model based on the 1F21 movement.
Parts List
| K03N46JN01 | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| TT30A | band - metal band |
| 07SC02NG | others - second hand |
| 04T08NGH | others - hour hand |
| 0351807 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 1F210A80XS14 | others - dial |
| 1F215A30 | others - case back |
| 1F215A3025 | others - case |
| 1F219 | others - machine code |
| 82813040 | others - case ring |
| 04T10NGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |