The Seiko 1F20-0D90 is a watch model based on the 1F20 movement.
Parts List
| 190W26SN01 | crystal |
| 25M02NA3 | crown |
| 25M02NS3 | crown |
| 0H1720N01 | case back gasket - case back gasket |
| MK18E | band - leather band |
| MK19E | band - leather band |
| MK20E | band - leather band |
| 0351807 | others - winding stem |
| 06Y46DGH | others - hour hand |
| 82822260 | others - case ring |
| 1F200D901E | others - case |
| 1F200D9043 | others - case |
| 1F201E40XG14 | others - dial |
| 1F201E40XS13 | others - dial |
| 1F201E50XG15 | others - dial |
| 1F209 | others - machine code |
| A120AS | others - push pin |
| 06Y46DGM | others - minute hand |
| 07YA4AGH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 07YA4ASH | others - hour hand |
| 07YA4CGM | others - minute hand |
| 07YA4CSM | others - minute hand |
Caliber 1F20
