The Seiko 1F20-0B10 is a watch model based on the 1F20 movement.
Parts List
| 205N08JN01 | crystal |
| 25M02NA4 | crown - crown |
| 0H1900B01 | case back gasket - case back gasket |
| 0H1900B0 | case back gasket |
| WJA39G | band |
| ZJZ20G | band - leather band |
| WJJ36G | band |
| A130AS | others - push pin (for lb) |
| 1F200B10 | others - case back |
| 1F200B10CH | others - case |
| 1F200F40XG14 | others - dial |
| 1F200F50XS19 | others - dial |
| 1F200F60XS19 | others - dial |
| 1F209 | others - machine code |
| 0351807 | others - winding stem |
| 82820780 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
| 08Y32NGM | others - minute hand |
| 08Y01AGM | others - minute hand |
| 08Y32NGH | others - hour hand |
| 08Y01AGH | others - hour hand |
Caliber 1F20
