The Seiko 1F20-5B09 is a watch model based on the 1F20 movement.
Parts List
| 175N04GN00 | crystal - crystal |
| 175N04GN | crystal |
| 25M02NA3 | crown |
| 0H1610N01 | case back gasket |
| 0H1610N0 | case back gasket |
| WHA20G | band |
| BHA41G | band - leather band |
| BHJ65G | band - leather band |
| WHJ27G | band |
| 0351807 | others - winding stem |
| 1F200B60XG14 | others - dial |
| 1F200B60XS14 | others - dial |
| 1F205B09 | others - case back |
| 1F205B0925 | others - case |
| 1F209 | others - machine code |
| 82813500 | others - case ring |
| A120AS | others - push pin |
| DZ0041B01 | others - crown and stem gasket |
| 07Y34DBM | others - minute hand |
| 07Y34NBH | others - hour hand |
Caliber 1F20
