The Seiko Y131-6520 is a watch model based on the Y131 movement.
Parts List
| 270N52GN00 | crystal |
| 35MP8NF1 | crown |
| 0G2500B01 | case back gasket - case back gasket |
| 014LH | band - leather band |
| A160BS | others - push pin |
| 0354786 | others - winding stem |
| EZ0058B01 | others - crown and stem gasket |