The Seiko Y131-5900 is a watch model based on the Y131 movement.
Parts List
| ESJN86LN01 | crystal |
| 35MP8NF1 | crown |
| 0H2600B01 | case back gasket - case back gasket |
| OH2600B01 | case back gasket |
| 384LA | band - leather band |
| 386LA | band - leather band |
| 12SC50TG | others - second hand |
| 0354786 | others - winding stem |
| 09C44NAH | others - hour hand |
| A180BS | others - push pin |
| Y1314648XG14 | others - dial |
| Y1314648XS14 | others - dial |
| Y1315900FF | others - case |
| 09C38NGM | others - minute hand |
| EZ0058B01 | others - crown and stem gasket |
| 09C38ADM | others - minute hand |
| 2AA090SMBNG | others - minute hand |
| 09C44FGH | others - hour hand |