The Seiko 1F20-5K10 is a watch model based on the 1F20 movement.
Parts List
| REEN02JU02 | crystal - crystal |
| REEN02JU01 | crystal - crystal |
| 30M98NA1 | crown |
| 30M98NS1 | crown - crown |
| 0H1400B01 | case back gasket - case back gasket |
| 0H1400B0 | case back gasket |
| Z5442S | band |
| Z5442G | band - band |
| Z5442S-BK4S | clasp - clasp |
| Z5442S-PB1 | clasp - parts for buckle/clasp |
| Z5442G-BK4G | clasp - buckle |
| Z5442G-PB1 | clasp - parts for buckle |
| 1F202A40XB13 | others - dial |
| 1F202A40XG14 | others - dial |
| 1F202A40XS14 | others - dial |
| 1F205 | others - machine code |
| 1F205K10 | others - case back |
| 1F205K1025 | others - case |
| 1F205K102E | others - case |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82824700 | others - case ring |
| 0351807 | others - winding stem |
| 04Y11DGH | others - hour hand |
| 04Y11DGM | others - minute hand |
| 1CG030L0BDG | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 2CG045L0BDS | others - minute hand |
| 2CG045L0BDA | others - minute hand |
| 2CG045L0BDG | others - minute hand |
| 04Y11DSM | others - minute hand |
| 1CG030L0BDS | others - hour hand |
| 1CG030L0BDA | others - hour hand |
| 04Y11DSH | others - hour hand |
Caliber 1F20
