The Seiko Y131-612M is a watch model based on the Y131 movement.
Parts List
| 240W54LN01 | crystal |
| 35M78NH1 | crystal |
| FH2580B01 | case back gasket |
| 86575806 | crystal gasket |
| AL91C | band - leather band |
| A160BS | others - push pin |
| 10CP2FAH | others - hour hand |
| 0354786 | others - winding stem |
| 10CP2FAM | others - minute hand |