The Seiko 1F20-1B70 is a watch model based on the 1F20 movement.
Parts List
| 160W10JM01 | crystal |
| 30MA2NA1 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| D082CB | band - metal band |
| 0351807 | others - winding stem |
| 82835880 | others - case ring |
| 1F201B70 | others - case back |
| 1F201B7079 | others - case |
| 1F202J00XS14 | others - dial |
| 1F205 | others - machine code |
| T070AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 2CC065A0BNG | others - minute hand |
| 1CC045A0BNG | others - hour hand |
Caliber 1F20
