The Seiko 1F20-5100 is a watch model based on the 1F20 movement.
Parts List
| K01A89SN01 | crystal - crystal (sapphire) |
| 25M25DA5 | crown - crown (3h) |
| 0H1500B01 | case back gasket - case back gasket |
| DAY3BW | band - band |
| 89920155 | band - other |
| DA33BW | band - leather band |
| 2CC060A1BAA | others - minute hand |
| 1CC037A1BAA | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351807 | others - winding stem |
| 1CA037A1BNG | others - hour hand |
| T090AS | others - push pin |
| 1F20510043A | others - case |
| 82871190 | others - case ring |
| 1F200280XS14 | others - dial |
| 1F200290XS19 | others - dial |
| 1F205 | others - machine code |
| 2CA060A1BNG | others - minute hand |
Caliber 1F20
