The Seiko 1F20-0H20 is a watch model based on the 1F20 movement.
Parts List
| 120N06JN01 | crystal |
| 120N06JN | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| B5655J | band |
| B5655S | band |
| B5655G-LKG | band - link |
| B5655J-LKS | band - link |
| B5655K | band - metal band |
| B5655K-LKG | band - link |
| B5655S-LKS | band - link |
| Q5047G | band - metal band |
| Q5047G-LKG | band - link |
| Q5047K | band - metal band |
| Q5047K-LKG | band - link |
| Q5047L | band - metal band |
| Q5047L-LKG | band - link |
| B5655G | band |
| B5655J-BK4S | clasp - clasp |
| B5655G-BK4G | clasp - clasp |
| Q5047L-BK4G | clasp - clasp |
| Q5047K-BK4G | clasp - clasp |
| Q5047G-BK4G | clasp - clasp |
| B5655S-BK4S | clasp - clasp |
| B5655K-BK4G | clasp - clasp |
| Q5047G-EPG | others - endpiece |
| Q5047K-EPG | others - endpiece |
| Q5047L-EPG | others - endpiece |
| 0351807 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82813320 | others - case ring |
| 1F200H20 | others - case back |
| 1F200H2025 | others - case |
| 1F200H2025A | others - case |
| 1F200H2025Y | others - case |
| 1F200H2025Z | others - case |
| 1F200H202E | others - case |
| 1F200H202EZ | others - case |
| 1F202A50XB14 | others - dial |
| 1F202A50XG14 | others - dial |
| 1F202A50XL14 | others - dial |
| 1F202A50XS14 | others - dial |
| 1F202A58XB14 | others - dial |
| 1F202A58XG14 | others - dial |
| 1F202A58XL14 | others - dial |
| 1F202A58XS14 | others - dial |
| 1F202A58XS24 | others - dial |
| 1F202A60XS19 | others - dial |
| 1F202A68XS19 | others - dial |
| 1F205 | others - machine code |
| 2CF045L0BDG | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 2CC047A0BAA | others - minute hand |
| 04Y32DGM | others - minute hand |
| 1CF027L0BDG | others - hour hand |
| 04Y28AGM | others - minute hand |
| 1CC032A0BAA | others - hour hand |
| 04Y28AGH | others - hour hand |
Caliber 1F20
