The Seiko 1F20-1A90 is a watch model based on the 1F20 movement.
Parts List
| 165A12SV0C | crystal |
| 30MA2NA1 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| D021CQ | band - metal band |
| 1CC045A1BNG | others - hour hand |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 1F201A90 | others - case back |
| 1F201A907N | others - case |
| 1F202G40XS19 | others - dial |
| 1F205 | others - machine code |
| 82820240 | others - case ring |
| EZ0035B01 | others - crown and stem gasket |
| 2CC065A1BDG | others - minute hand |
Caliber 1F20
