The Seiko 1F20-5110 is a watch model based on the 1F20 movement.
Parts List
| K01A87SN01 | crystal - crystal (sapphire) |
| 6M27A1SNG0 | crown - crown |
| 6M27A1SNW0 | crown |
| 0F150BA1S | case back gasket - case back gasket |
| D0A3AZ | band - band |
| D0A3BZ | band - band |
| 1CH047A1BNG | others - hour hand |
| 2CH070A1BDG | others - minute hand |
| 1CH047A1BNS | others - hour hand |
| 2CH070A1BDS | others - minute hand |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190075 | others - bracelet fixing pipe |
| 81606459 | others - bracelet fixing pin |
| 1F20511025A | others - case |
| 82871270 | others - case ring |
| 1F205110 | others - case back |
| 1F20511029A | others - case |
| 1F200310XG29 | others - dial |
| 1F200320XS29 | others - dial |
| 1F203 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1F20
