The Seiko Y780-5040 is a watch model based on the Y780 movement.
Parts List
| SA3W60GN00 | crystal |
| 86173340 | case back gasket - plastic gasket for crystal |
| EG0115B01 | case back gasket - button gasket |
| 86562780 | crystal gasket - plastic gasket for crystal |
| QA89A | band - metal band |
| A200CS | others - push pin |
Other models with the same movement
| Y780-5000 |
| Y780-5010 |
| Y780-5050 |
| Y780-5090 |
| Y780-5110 |