The Seiko Y131-5850 is a watch model based on the Y131 movement.
Parts List
| SAGN54LM01 | crystal - crystal (inorganic) |
| SAGN54LM02 | crystal - crystal (inorganic) |
| 35MB0NF1 | crown |
| 0H2600N01 | case back gasket - case back gasket |
| 044LE | band - leather band |
| 046LE | band - leather band |
| A160BS | others - push pin |
| 0354786 | others - winding stem |
| 07C58NGH | others - hour hand |
| 07C58NGM | others - minute hand |
| EZ0058B01 | others - crown and stem gasket |
| 13SC04A2 | others - second hand |