The Seiko 1F21-0D50 is a watch model based on the 1F21 movement.
Parts List
| 170W08SN02 | crystal |
| 30MA2NA1 | crown - crown |
| 0A1700B01 | case back gasket |
| TT54A | band - metal band |
| TT55A | band - metal band |
| 3BA075F0BNG | others - second hand |
| 0351807 | others - winding stem |
| 1BF047L0BDG | others - hour hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82822840 | others - case ring |
| 1F210D50 | others - case back |
| 1F210D5075 | others - case |
| 1F210D507X | others - case |
| 1F210F00XS14 | others - dial |
| 1F215 | others - machine code |
| 2BF070L0BDG | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |