The Seiko 1F20-6F40 is a watch model based on the 1F20 movement.
Parts List
| BA0P04JZ0C | crystal - crystal |
| BA0P04JZ0D | crystal - crystal |
| BA0P04JZ0E | crystal - crystal |
| 25M24NS1 | crown |
| 25M24TN1 | crown - crown |
| 0E170NA1S | case back gasket - case back gasket |
| C053BB | band - band |
| C054AB | band - band |
| C055BB | band - band |
| 1CE027L0BDS | others - hour hand |
| 2CE040L0BDG | others - minute hand |
| 2CE040L0BDS | others - minute hand |
| 0351807 | others - winding stem |
| 1CE027L0BDG | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1F206F4025 | others - case |
| 82838920 | others - case ring |
| 1F206F40 | others - case back |
| 1F206F4025A | others - case |
| 1F206F402E | others - case |
| 1F202P10XL13 | others - dial |
| 1F202P10XS14 | others - dial |
| 1F202P10XZ14 | others - dial |
| 1F205 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1F20
