The Seiko 5Y31-5A70 is a watch model based on the 5Y31 movement.
Parts List
| REJN05JV01 | crystal |
| 30N97NN1 | crown |
| 0H2650B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| B1579G | band |
| B1579G-BK5G | clasp - clasp |
| 3BA075F1BNG | others - second hand |
| 07SC43NG | others - second hand |
| A120BS | others - push pin (for lb) |
| 5Y315A70 | others - case back |
| 5Y315A7025 | others - case |
| 5Y315B70XB14 | others - dial |
| 82820430 | others - case ring |
| 07T35DGH | others - hour hand |
| 07T35DGM | others - minute hand |