The Seiko 1F20-0E90 is a watch model based on the 1F20 movement.
Parts List
| 220N52JN01 | crystal |
| 220N52JN | crystal |
| 40MC8NA1 | crown |
| 35MH4NA4 | crown |
| 40MC8NS1 | crown - crown |
| 0H2001B03 | case back gasket |
| 0H2001B0 | case back gasket |
| BJA53G | band |
| WJJ57G | band - leather band |
| ZJJ41G | band |
| BJA53S | band |
| A130AS | others - push pin (for lb) |
| 1F200E90 | others - case back |
| 1F200E902E | others - case |
| 1F200E90CH | others - case |
| 1F200E90CHA | others - case |
| 1F201F90XN19 | others - dial |
| 1F201F90XS19 | others - dial |
| 1F201G00XG14 | others - dial |
| 1F201G20XS19 | others - dial |
| 1F209 | others - machine code |
| 82823040 | others - case ring |
| 0351807 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 09Y04NAM | others - minute hand |
| 2CD090A4BAA | others - minute hand |
| 09Y14AGM | others - minute hand |
| 09Y04NAH | others - hour hand |
| 09Y14ASM | others - minute hand |
| 09Y18AGH | others - hour hand |
| 09Y18ASH | others - hour hand |
Caliber 1F20
