The Seiko 1F20-0BY0 is a watch model based on the 1F20 movement.
Parts List
| RE7A92SN02 | crystal - crystal (sapphire) |
| 6K35D0SNG1 | crown - crown (3h) |
| 0F160BAD2 | case back gasket - case back gasket |
| DG11BB | band - leather band |
| DG12BB | band - leather band |
| DG12BB-LB | band - leather without buckle |
| DG13BB | band - other band |
| 2CG042L0BDZ | others - minute hand |
| 1CG030L0BDZ | others - hour hand |
| 1F200BY0 | others - case back |
| 1F200BY002A | others - case |
| 82845760 | others - case ring |
| 0351807 | others - winding stem |
| AC004BAD1 | others - crown and stem gasket |
| 1F200CM0XS15 | others - dial |
| 1F203 | others - machine code |
Caliber 1F20
