The Seiko 1F20-5K8A is a watch model based on the 1F20 movement.
Parts List
| ESMN12SJ02 | crystal |
| 30MK4NA5 | crown |
| 0H1610N01 | case back gasket |
| 81610601 | band - bracelet fixing pin |
| WGZ12 | band - leather band |
| 82831420 | others - case ring |
| 0351807 | others - winding stem |
| 1CF040L0BDG | others - hour hand |
| 1F202B50XL1Z | others - dial |
| 1F205 | others - machine code |
| 1F205K8A | others - case back |
| 1F205K8A25 | others - case |
| 81503901 | others - screw |
| 2CF055L0BDG | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1F20
