The Seiko 1F21-0D70 is a watch model based on the 1F21 movement.
Parts List
| 185W10SV01 | crystal - crystal |
| 25M20NA3 | crown |
| 0A1800N01 | case back gasket |
| HB61A | band - metal band |
| 07SC06DG | others - second hand |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82821060 | others - case ring |
| 1F210D70 | others - case back |
| 1F210D70SA | others - case |
| 1F210F40X914 | others - dial |
| 1F210K50XA14 | others - dial |
| 1F215 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
| 1BB050L0BDG | others - hour hand |
| 2BB075L0BDG | others - minute hand |