The Seiko Y661-4030 is a watch model based on the Y661 movement.
Parts List
| BA1W49LM10 | crystal |
| BA1W49LM40 | crystal |
| BA1W49LM50 | crystal |
| 35M53NS1 | crown |
| 35M53NN1 | crown |
| 010110B01 | case back gasket |
| DH0115B01 | case back gasket - crown and stem gasket |
Other models with the same movement
| Y661-4010 |
| Y661-4020 |