The Seiko 5Y31-1000 is a watch model based on the 5Y31 movement.
Parts List
| 230W21HK01 | crystal |
| 30MC7NA1 | crown - crown |
| 30MC7NS1 | crown |
| 0F200BAA3 | case back gasket - case back gasket |
| LK48E | band - leather band |
| LK49E | band - leather band |
| LK50E | band - leather band |
| GB09B | band - metal band |
| 09SC27NG | others - second hand |
| 09SC27NS | others - second hand |
| 3BA125F1BNS | others - second hand |
| 3BA125F1BNG | others - second hand |
| 0D005BA13 | others - crown and stem gasket |
| 0351671 | others - winding stem |
| 08T35NGH | others - hour hand |
| 5Y311000 | others - case back |
| 5Y31100075 | others - case |
| 5Y3110007E | others - case |
| 5Y311000XB13 | others - dial |
| 5Y311000XS14 | others - dial |
| 5Y311010XS14 | others - dial |
| 5Y311010XS33 | others - dial |
| 5Y3161 | others - machine code |
| 82801390 | others - case ring |
| A170BS | others - push pin |
| 08T35NSH | others - hour hand |
| 09T59NGM | others - minute hand |
| 09T59NSM | others - minute hand |
| 09T77DGH | others - hour hand |
| 09T77DGM | others - minute hand |
| 09T77DSH | others - hour hand |
| 09T77DSM | others - minute hand |
| 09Y77DGM | others - minute hand |
| 1BF065LABDG | others - hour hand |
| 2BA095F5BNG | others - minute hand |
| 2BA095F5BNS | others - minute hand |
| 2BF095LABDG | others - minute hand |