The Seiko Y131-5720 is a watch model based on the Y131 movement.
Parts List
| ES9W86LN01 | crystal |
| 35MR6NF1 | crown |
| 0A2500B01 | case back gasket - case back gasket |
| 022MG | band - metal band |
| A160BS | others - push pin |
| 0354786 | others - winding stem |
| AD006BA12 | others - crown gasket |