The Seiko 1F20-1B30 is a watch model based on the 1F20 movement.
Parts List
| 160A02SN02 | crystal - crystal (sapphire) |
| 30MA2NA1 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| E012BZ | band - metal band |
| E012CZ | band - metal band |
| 1CF040LMBDG | others - hour hand |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1F201B30 | others - case back |
| 1F201B3075 | others - case |
| 1F201B307H | others - case |
| 1F202H10XB14 | others - dial |
| 1F202H20XG14 | others - dial |
| 1F202H20XS14 | others - dial |
| 1F205 | others - machine code |
| 82820240 | others - case ring |
| EZ0035B01 | others - crown and stem gasket |
| 2CF060LMBDG | others - minute hand |
Caliber 1F20
