The Seiko 1F20-5C90 is a watch model based on the 1F20 movement.
Parts List
| K04N22JN01 | crystal |
| K04N22JN | crystal |
| 30M98NA1 | crown |
| 30M98NS1 | crown - crown |
| 0E140NA1S | case back gasket - case back gasket |
| 0H1400B01 | case back gasket - case back gasket |
| M5093G | band - band |
| 44L9BB | band - metal band |
| 44L9BB-LKG | band - link |
| M5091K | band |
| M5091J | band |
| 44L9BB-BK4G | clasp - buckle |
| M5091K-BK3G | clasp - clasp |
| M5093G-BK3G | clasp - buckle |
| 1F205C9025 | others - case |
| 82820600 | others - case ring |
| 1F205C90 | others - case back |
| B080AS | others - push pin |
| 1F200G68XB14 | others - dial |
| 1F200G68XG14 | others - dial |
| 1F200G68XG24 | others - dial |
| 1F200G68XS13 | others - dial |
| 1F200G68XS24 | others - dial |
| 1F200G78XS19 | others - dial |
| 1F200G88XS19 | others - dial |
| 1F200K00XB14 | others - dial |
| 1F200K00XG14 | others - dial |
| 1F200K10XB14 | others - dial |
| 1F200K10XG14 | others - dial |
| 1F205C9025Z | others - case |
| 1F205C9029Z | others - case |
| 1F209 | others - machine code |
| 0351807 | others - winding stem |
| 03Y04NGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 03Y06DGM | others - minute hand |
| 03Y06DGH | others - hour hand |
| 03Y04FGM | others - minute hand |
| 03Y10AGH | others - hour hand |
| 03Y04NSM | others - minute hand |
| 03Y04ASM | others - minute hand |
| 03Y10NSH | others - hour hand |
| 03Y10ASH | others - hour hand |
| 03Y10NAH | others - hour hand |
Caliber 1F20
