The Seiko Y131-5520 is a watch model based on the Y131 movement.
Parts List
| ESDN96LN01 | crystal |
| 35MP8NF1 | crown |
| 0A2200B01 | case back gasket - case back gasket |
| DK82B | band - leather band |
| 10SC10AG | others - second hand |
| 09T04A1H | others - hour hand |
| 09T18AGM | others - minute hand |
| 09T04N1H | others - hour hand |
| A120BS | others - push pin (for lb) |
| 0354786 | others - winding stem |
| EZ0058B01 | others - crown and stem gasket |
| 09T18NGM | others - minute hand |