The Seiko 1F20-0F90 is a watch model based on the 1F20 movement.
Parts List
| 195N14SN02 | crystal |
| 195N14SN | crystal |
| 25M02NA4 | crown - crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| BHJ71G | band |
| 0351807 | others - winding stem |
| 82814520 | others - case ring |
| 1F200E00XG14 | others - dial |
| 1F200E10XS19 | others - dial |
| 1F200F90GR | others - case |
| 1F209 | others - machine code |
| A120AS | others - push pin |
| DZ0041B01 | others - crown and stem gasket |
| 08Y05NGM | others - minute hand |
| 07Y14FBM | others - minute hand |
| 08Y05NGH | others - hour hand |
| 07Y14FBH | others - hour hand |
Caliber 1F20
