The Seiko 5Y31-6A70 is a watch model based on the 5Y31 movement.
Parts List
| 230W21HK01 | crystal |
| 30M93NN1 | crown - crown |
| 0F220BAA3 | case back gasket - case back gasket |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| LK05E | band - leather band |
| 3BA125F1BNG | others - second hand |
| 09SC27NG | others - second hand |
| 0351671 | others - winding stem |
| EB0055B01 | others - crown and stem gasket |
| 82732850 | others - case ring |
| 5Y3161 | others - machine code |
| 5Y316A7098 | others - case |
| 5Y316A70XS14 | others - dial |
| A170BS | others - push pin |
| 09T71DGH | others - hour hand |
| 09T71DGM | others - minute hand |