The Seiko 5Y39-8040 is a watch model based on the 5Y39 movement.
Parts List
| 310W74JM | crystal |
| 310W74JM02 | crystal |
| 35M82NH1 | crown |
| 0A2600B01 | case back gasket |
| 0A2600B | case back gasket |
| BPZ60Y | band - leather band |
| 1BB080A0BNG | others - hour hand |
| 0351670 | others - winding stem |
| 82803220 | others - case ring |
| 0801947 | others - date dial |
| 5Y398040 | others - case back |
| 5Y398040WG | others - case |
| 5Y398048XS29 | others - dial |
| 5Y399 | others - machine code |
| A180BS | others - push pin |
| 0Z0060B01 | others - crown and stem gasket |
| 11TB2NAM | others - minute hand |
| 12T08NGH | others - hour hand |