The Seiko 3F31-0B70 is a watch model based on the 3F31 movement.
Parts List
| 190P06SN01 | crystal |
| 35M2RTH2 | crown |
| 35M2RTS2 | crown |
| 0F190NAAS | case back gasket - case back gasket |
| 86574900 | crystal gasket |
| C005AM | band - metal band |
| C005CM | band - metal band |
| 12ST16DG | others - second hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 0354735 | others - winding stem |
| 82834860 | others - case ring |
| 3F310B70 | others - case back |
| 3F310B708N | others - case |
| 3F310B709V | others - case |
| 3F310B80XS14 | others - dial |
| 3F310B80XS23 | others - dial |
| 3F311 | others - machine code |
| 87020760 | others - back plate |
| 12ST16DS | others - second hand |
| EA0040B0A | others - crown and stem gasket |
| 1AA055A2BAF | others - hour hand |
| 1AA055A2BAH | others - hour hand |
| 2AA080A2BCF | others - minute hand |
| 2AA080A2BCH | others - minute hand |