The Seiko 1F21-0H50 is a watch model based on the 1F21 movement.
Parts List
| 170W02SN01 | crystal |
| 6K30A0SNG1 | crown |
| 0F170NA1S | case back gasket - case back gasket |
| 86572840 | crystal gasket |
| HA40A | band - band |
| 82822840 | others - case ring |
| 1F210H507G | others - case |
| 1F210H50 | others - case back |
| 1F210H507GA | others - case |
| 1F211A80XS14 | others - dial |
| 1F215 | others - machine code |
| T070AS | others - push pin |
| 1BF047L0BDG | others - hour hand |
| 0351807 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 2BF070L0BDG | others - minute hand |
| 3BA080F0BNG | others - second hand |