The Seiko Y131-6320 is a watch model based on the Y131 movement.
Parts List
| 35MS4NC1 | crown |
| 35MP0NC1 | crown |
| 35MS4NF1 | crown |
| 0A2400B01 | case back gasket |
| 207LBB | band |
| 229LBB | band - leather band |
| 233LBB | band - leather band |
| 235LBB | band - leather band |
| 237LBB | band - leather band |
| VL72A | band - other band |
| 227LBB | band |
| EG0060B01 | others - button gasket |
| 0354786 | others - winding stem |
| 11C16AGH | others - hour hand |
| 11C22AGM | others - minute hand |
| 13SC04A2 | others - second hand |
| 13SC04AB | others - second hand |
| 13SC04AC | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 11CP4FCM | others - minute hand |
| 11C22AGH | others - hour hand |
| 11CP4FAH | others - hour hand |
| 11CP4FLH | others - hour hand |
| 11CP4XRM | others - minute hand |
| 11CP4XRH | others - hour hand |