The Seiko 1F20-5K70 is a watch model based on the 1F20 movement.
Parts List
| REEN20JR03 | crystal - crystal |
| REEN20JR | crystal |
| 27M04NA1 | crown |
| 0E140NA1S | case back gasket - case back gasket |
| 0E140NA1 | case back gasket |
| 2020BB | band - band |
| 2020BB-BKBG | clasp - buckle |
| 1F202B40XE14 | others - dial |
| 1F205 | others - machine code |
| 81190055 | others - bracelet fixing pipe |
| 1F205K7026 | others - case |
| 82812160 | others - case ring |
| 81607999 | others - bracelet fixing pin |
| 1F205K70 | others - case back |
| 0351807 | others - winding stem |
| 2CE042L0BDG | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 04Y12DGM | others - minute hand |
| 1CE030L4BDG | others - hour hand |
| 04Y12DGH | others - hour hand |
Caliber 1F20
