The Seiko Y131-6040 is a watch model based on the Y131 movement.
Parts List
| 280N16LM03 | crystal |
| 280N16GM01 | crystal |
| 35M98NN1 | crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| FH2781B01 | case back gasket |
| JK71B | band - leather band |
| JK72B | band - leather band |
| JK93A | band - leather band |
| JK99A | band - leather band |
| A180BS | others - push pin |
| 0354786 | others - winding stem |
| 11C28FWH | others - hour hand |
| 11C28FWM | others - minute hand |
| 11C32FAH | others - hour hand |
| 13SC04AB | others - second hand |
| 11C32FAM | others - minute hand |
| 11C36FAH | others - hour hand |
| 10CT6ABH | others - hour hand |
| 10CT6ABM | others - minute hand |
| 11C36FAM | others - minute hand |
| 13SC04AW | others - second hand |
| 10C24ASH | others - hour hand |
| 10C24ASM | others - minute hand |
| 10CT6AWH | others - hour hand |
| 11C36ASM | others - minute hand |
| 10CT6AWM | others - minute hand |
| 11C36ASH | others - hour hand |