The Seiko 1F20-0J90 is a watch model based on the 1F20 movement.
Parts List
| 150A50SR02 | crystal |
| 30MA2NB1 | crown - crown |
| 0F140BA1S | case back gasket - case back gasket |
| TZ20A | band - metal band |
| TZ21A | band - metal band |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82821420 | others - case ring |
| 1F200J90 | others - case back |
| 1F200J9075 | others - case |
| 1F200J907N | others - case |
| 1F202E00XS14 | others - dial |
| 1F202E10XS19 | others - dial |
| 1F205 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
| 1CC040A2BNG | others - hour hand |
| 2CA060A1BDG | others - minute hand |
| 2CC060A0BDG | others - minute hand |
| 1CA040A1BNG | others - hour hand |
Caliber 1F20
