The Seiko 8305-8040 is a watch model based on the 8305 movement.
Parts List
| 310T16ANS0 | crystal |
| 310T16ANG | crystal |
| 310T05AN | crystal |
| 310T18ANS | crystal - plastic crystal |
| 45W24NS1 | crown - crown |
| 45W24NA1 | crown |
Other models with the same movement
| 8305-0020 |
| 8305-0029 |
| 8305-0030 |
| 8305-0990 |
| 8305-1000 |
| 8305-1010 |
| 8305-1990 |
| 8305-5000 |
| 8305-8010 |
| 8305-8020 |
| 8305-8030 |
| 8305-8031 |
| 8305-8041 |
| 8305-8050 |
| 8305-8051 |
| 8305-8060 |
| 8305-9000 |
| 8305-9010 |