The Seiko Y977-7A20 is a watch model based on the Y977 movement.
Parts List
| 280WR0LN01 | crystal |
| 40MP6NF1 | crown - crown |
| 35MN4NF1 | crown |
| 86584850 | case back gasket |
| 86577060 | crystal gasket |
| NO | band - leather band |
| 026ZAK | band |
| 04E30RR | hand - sub hand |
| 82729220 | others - case ring |
| A200BS | others - push pin |
| Y9777A207S | others - case |
| Y9777A28XS14 | others - dial |
| 0351793 | others - winding stem |
| 0351794 | others - winding stem |
| 11C90NGH | others - hour hand |
| 11C90NGM | others - minute hand |
| 13SC04A2 | others - second hand |
| AD006BA12 | others - crown gasket |
Other models with the same movement