The Seiko 1F20-0100 is a watch model based on the 1F20 movement.
Parts List
| 160A01SN01 | crystal - crystal (sapphire) |
| 25M25DA5 | crown - crown (3h) |
| 0H1500B01 | case back gasket - case back gasket |
| 89920155 | band - other |
| DA22BW | band - leather band |
| DAY2BW | band - leather band |
| T090AS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0351807 | others - winding stem |
| 82871190 | others - case ring |
| 1F20010043A | others - case |
| 1F200260XS14 | others - dial |
| 1F200270XS19 | others - dial |
| 1F205 | others - machine code |
| 1CC045A1BAA | others - hour hand |
| 1CA045A1BNG | others - hour hand |
| 2CA065A1BNG | others - minute hand |
| 2CC065A1BAA | others - minute hand |
Caliber 1F20
