The Seiko 6306-8020 is a watch model based on the 6306 movement.
Parts List
| 310W34GN00 | crystal |
| 45M30NA1 | crown |
| 45M30NS1 | crown |
| DB2935B | case back gasket |
| DJ0060B | others - crown gasket |
Other models with the same movement
| 6306-5000 |
| 6306-5001 |
| 6306-6001 |
| 6306-7001 |
| 6306-7010 |
| 6306-8000 |
| 6306-8010 |
| 6306-8030 |
| 6306-8040 |
| 6306-8050 |
| 6306-8060 |
| 6306-806A |