The Seiko 1F20-0B90 is a watch model based on the 1F20 movement.
Parts List
| 145N08SK01 | crystal |
| 30M36NA3 | crown - crown |
| 0H1400N01 | case back gasket - case back gasket |
| 81931641 | clasp - clasp |
| 06Y36DGH | others - hour hand |
| 0351807 | others - winding stem |
| 82813280 | others - case ring |
| 1F200B09 | others - case back |
| 1F200B9025 | others - case |
| 1F200J20XG14 | others - dial |
| 1F209 | others - machine code |
| 06Y36DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1F20
