The Seiko 1F20-0H70 is a watch model based on the 1F20 movement.
Parts List
| 180W26JK | crystal |
| 180W26JK01 | crystal |
| 35ML8NA1 | crown - crown |
| 0A1900B0A | case back gasket |
| EA0040B0 | case back gasket |
| 86581700 | crystal gasket |
| 86581701 | crystal gasket |
| BHZ50S | band |
| BHA59G | band - leather band |
| BHJ87G | band - leather band |
| BHA57G | band |
| BHJ86G | band |
| A120BS | others - push pin (for lb) |
| 1F200H70 | others - case back |
| 1F200H706Y | others - case |
| 1F200H7075 | others - case |
| 1F200H7075A | others - case |
| 1F200H7098 | others - case |
| 1F202C20XL14 | others - dial |
| 1F202C20XS14 | others - dial |
| 1F202C30XS14 | others - dial |
| 1F205 | others - machine code |
| 0351807 | others - winding stem |
| 82820780 | others - case ring |
| EA0040B0A | others - crown and stem gasket |
| 2CB075A0BNG | others - minute hand |
| 1CB052A0BNG | others - hour hand |
Caliber 1F20
