The Seiko 1F21-0AH0 is a watch model based on the 1F21 movement.
Parts List
| RE7A38SB0A | crystal - crystal |
| 6K40C0SNW1 | crown - crown |
| 0F230BAD2 | case back gasket - case back gasket |
| DET9AW | band - band |
| 3BA090F1BNS | others - second hand |
| 1BA050L2BDS | others - hour hand |
| 2BA077L0BDS | others - minute hand |
| 82844340 | others - case ring |
| 1F210AH0 | others - case back |
| 1F210AT0XS13 | others - dial |
| 1F215 | others - machine code |
| S180BS | others - push pin |
| 0351807 | others - winding stem |
| AC004BAD1 | others - crown and stem gasket |
| 1F210AH002A | others - case |