The Seiko 1F21-0K40 is a watch model based on the 1F21 movement.
Parts List
| 6K30A0SNG1 | crown |
| DL22B | band - band |
| 82822840 | others - case ring |
| 1F210K407L | others - case |
| 1F211F40XS14 | others - dial |
| 1F215 | others - machine code |
| A110AS | others - push pin |
| 0351807 | others - winding stem |
| 1BH045A0BNG | others - hour hand |
| 2BH070A0BNG | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
| 3BA080F0BNG | others - second hand |