The Seiko 1F21-5C70 is a watch model based on the 1F21 movement.
Parts List
| RE1A46SR02 | crystal - crystal |
| 6M35A2SNGB | crown - crown |
| 6M35A2SNWB | crown - crown |
| 0F160NA1S | case back gasket - case back gasket |
| DB88AB | band - band |
| DB87BB | band - band |
| 1BC037A1BNB | others - hour hand |
| 1BH035A0BNB | others - hour hand |
| 2BC057A1BNB | others - minute hand |
| 2BH055A0BNB | others - minute hand |
| 3BA075F1BAB | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351807 | others - winding stem |
| 1F215C70RH | others - case |
| 1F205 | others - machine code |
| 1F211G90XA19 | others - dial |
| 1F211H00XA19 | others - dial |
| 1F215 | others - machine code |
| A140BS | others - push pin |
| 1F215C707E | others - case |
| 82837260 | others - case ring |
| 1F215C70 | others - case back |