The Seiko Y642-5020 is a watch model based on the Y642 movement.
Parts List
| ESBN99AN00 | crystal |
| 35D05NN5 | crown |
| 35D05NT5 | crown |
Other models with the same movement
| Y642-0010 |
| Y642-0020 |
| Y642-0030 |
| Y642-0040 |
| Y642-0050 |
| Y642-0060 |
| Y642-0070 |
| Y642-0080 |
| Y642-0100 |
| Y642-0110 |
| Y642-0120 |
| Y642-0130 |
| Y642-0150 |
| Y642-5000 |
| Y642-5010 |
| Y642-5030 |
| Y642-5040 |
| Y642-5050 |
| Y642-5060 |
| Y642-5080 |