The Seiko 1F20-5F20 is a watch model based on the 1F20 movement.
Parts List
| RE2W48SN01 | crystal |
| 30MA2NA1 | crown - crown |
| 0A1800B01 | case back gasket |
| HG01A | band - metal band |
| HG02A | band - metal band |
| HG03A | band - metal band |
| 05Y38NGM | others - minute hand |
| 05Y38NGH | others - hour hand |
| 0351807 | others - winding stem |
| 1F201A80XS19 | others - dial |
| 1F201A90XS14 | others - dial |
| 1F201D60XS14 | others - dial |
| 1F205F20 | others - case back |
| 1F205F2075 | others - case |
| 1F205F207N | others - case |
| 1F209 | others - machine code |
| 82821180 | others - case ring |
| 87020460 | others - back plate |
| A120AS | others - push pin |
| 05Y17AGM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
| 05Y17AGH | others - hour hand |
Caliber 1F20
