The Seiko 1F20-5F90 is a watch model based on the 1F20 movement.
Parts List
| K04N22JN01 | crystal |
| K04N22JN | crystal |
| 30M98NA1 | crown |
| 0H1400B01 | case back gasket - case back gasket |
| 0H1400B0 | case back gasket |
| Z5376G-LKG | band - link |
| Z5376G | band |
| Z5376K-LKG | band - link |
| Z5376K | band |
| Z5376K-BK4G | clasp - clasp |
| Z5376G-BK4G | clasp - clasp |
| 0351807 | others - winding stem |
| 1F201C60XB14 | others - dial |
| 1F201C60XG14 | others - dial |
| 1F201C68XB14 | others - dial |
| 1F201C68XG14 | others - dial |
| 1F205F90 | others - case back |
| 1F205F9025 | others - case |
| 1F205F9025Z | others - case |
| 1F209 | others - machine code |
| 82821660 | others - case ring |
| T070AS | others - push pin |
| DZ0041B01 | others - crown and stem gasket |
| 03Y06DGM | others - minute hand |
| 03Y06DGH | others - hour hand |
Caliber 1F20
