The Seiko 1F20-5H40 is a watch model based on the 1F20 movement.
Parts List
| REDN32JN01 | crystal |
| REDN32JN | crystal |
| 30M62NA3 | crown |
| 30M62NS4 | crown |
| 0H2100B0 | case back gasket |
| 0H2100B01 | case back gasket |
| BHA49G | band |
| BHA49S | band - leather band |
| WHA35G-LB | band - leather without buckle |
| WHA35G | band |
| WHJ44G | band |
| WHJ44G-BK1G | clasp - clasp |
| WHA35G-BK1G | clasp - clasp |
| 82823520 | others - case ring |
| 1F201H40XG14 | others - dial |
| 1F201H50XN19 | others - dial |
| 1F201H50XS19 | others - dial |
| 1F201H60XS19 | others - dial |
| 1F202B60XG14 | others - dial |
| 1F202B70XS14 | others - dial |
| 1F205 | others - machine code |
| 1F205H40 | others - case back |
| 1F205H402E | others - case |
| 1F205H40CH | others - case |
| A120AS | others - push pin |
| 1CA042A0BNG | others - hour hand |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 2CA065A0BNG | others - minute hand |
| 2CD065A0BAC | others - minute hand |
| 2CC065A0BAA | others - minute hand |
| 06Y14NGM | others - minute hand |
| 2CF060A0BAA | others - minute hand |
| 2CF060A0BNG | others - minute hand |
| 2CD065A0BAA | others - minute hand |
| 1CD045A0BAC | others - hour hand |
| 1CC045A0BAA | others - hour hand |
| 1CF037A0BAA | others - hour hand |
| 1CF037A0BNG | others - hour hand |
| 1CD045A0BAA | others - hour hand |
| 06V10NGH | others - hour hand |
| 06Y08FBH | others - hour hand |
Caliber 1F20
