The Seiko 1F21-0A40 is a watch model based on the 1F21 movement.
Parts List
| 160W10JN01 | crystal |
| 30MA2NA1 | crown - crown |
| 0A1600B01 | case back gasket |
| ZA17A | band - metal band |
| ZA18A | band - metal band |
| 07SC02NG | others - second hand |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82812400 | others - case ring |
| 1F210A40 | others - case back |
| 1F210A4075 | others - case |
| 1F210A407N | others - case |
| 1F210B10XS14 | others - dial |
| 1F210B20XS19 | others - dial |
| 1F219 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
| 06T44NAH | others - hour hand |
| 06TB0FGH | others - hour hand |
| 06TB0FGM | others - minute hand |
| 06T44NAM | others - minute hand |