The Seiko 1F21-0H00 is a watch model based on the 1F21 movement.
Parts List
| 180P04SN02 | crystal |
| 35M0SNA1 | crown - crown |
| 0F180NAAS | case back gasket - case back gasket |
| 86570780 | crystal gasket |
| ZB41A | band - metal band |
| 81606439 | others - bracelet fixing pin |
| 81181839 | others - bracelet fixing pipe |
| 82821060 | others - case ring |
| 1F210H00 | others - case back |
| 1F210H006Y | others - case |
| 1F211A50XS14 | others - dial |
| 1F215 | others - machine code |
| 0351807 | others - winding stem |
| 07SC06DG | others - second hand |
| EA0040B0A | others - crown and stem gasket |
| 1BB050L2BDG | others - hour hand |
| 2BB075L4BDG | others - minute hand |