The Seiko Y131-5400 is a watch model based on the Y131 movement.
Parts List
| SADN60GN00 | crystal |
| 35MP8NF1 | crown |
| 0H2395B01 | case back gasket |
| KK94A | band - leather band |
| 0354786 | others - winding stem |
| 08CP4AAH | others - hour hand |
| A160BS | others - push pin |
| 08CP4AAM | others - minute hand |
| 13SC04A2 | others - second hand |
| EZ0058B01 | others - crown and stem gasket |