The Seiko Y131-6450 is a watch model based on the Y131 movement.
Parts List
| 270W60LM01 | crystal - crystal (inorganic) |
| 270W60LM02 | crystal - crystal (inorganic) |
| 270W60LM03 | crystal - crystal (inorganic) |
| 35MD2N01 | crown - crown |
| 35MD2NU1 | crown - crown |
| 35MD2NV1 | crown - crown |
| FE248BC12 | case back gasket |
| 86576245 | crystal gasket - plastic gasket for crystal |
| 261LB | band - leather band |
| 0354786 | others - winding stem |
| A160AS | others - push pin |